diff --git a/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs b/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs
index 3b2e1ec..6193dc3 100644
--- a/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs
+++ b/crates/fayalite-proc-macros-impl/src/hdl_type_common.rs
@@ -2069,16 +2069,11 @@ macro_rules! impl_bounds {
             $(
                 $Variant:ident,
             )*
-            $(
-                #[unknown]
-                $Unknown:ident,
-            )?
         }
     ) => {
         #[derive(Clone, Debug)]
         $vis enum $enum_type {
             $($Variant(known_items::$Variant),)*
-            $($Unknown(syn::TypeParamBound),)?
         }
 
         $(impl From<known_items::$Variant> for $enum_type {
@@ -2091,54 +2086,28 @@ macro_rules! impl_bounds {
             fn to_tokens(&self, tokens: &mut TokenStream) {
                 match self {
                     $(Self::$Variant(v) => v.to_tokens(tokens),)*
-                    $(Self::$Unknown(v) => v.to_tokens(tokens),)?
                 }
             }
         }
 
         impl $enum_type {
             $vis fn parse_path(path: Path) -> Result<Self, Path> {
-                #![allow(unreachable_code)]
                 $(let path = match known_items::$Variant::parse_path(path) {
                     Ok(v) => return Ok(Self::$Variant(v)),
                     Err(path) => path,
                 };)*
-                $(return Ok(Self::$Unknown(syn::TraitBound {
-                    paren_token: None,
-                    modifier: syn::TraitBoundModifier::None,
-                    lifetimes: None,
-                    path,
-                }.into()));)?
                 Err(path)
             }
-            $vis fn parse_type_param_bound(mut type_param_bound: syn::TypeParamBound) -> Result<Self, syn::TypeParamBound> {
-                #![allow(unreachable_code)]
-                if let syn::TypeParamBound::Trait(mut trait_bound) = type_param_bound {
-                    if let syn::TraitBound {
-                        paren_token: _,
-                        modifier: syn::TraitBoundModifier::None,
-                        lifetimes: None,
-                        path: _,
-                    } = trait_bound {
-                        match Self::parse_path(trait_bound.path) {
-                            Ok(retval) => return Ok(retval),
-                            Err(path) => trait_bound.path = path,
-                        }
-                    }
-                    type_param_bound = trait_bound.into();
-                }
-                $(return Ok(Self::$Unknown(type_param_bound));)?
-                Err(type_param_bound)
-            }
         }
 
         impl Parse for $enum_type {
             fn parse(input: ParseStream) -> syn::Result<Self> {
-                Self::parse_type_param_bound(input.parse()?)
-                    .map_err(|type_param_bound| syn::Error::new_spanned(
-                        type_param_bound,
+                Self::parse_path(Path::parse_mod_style(input)?).map_err(|path| {
+                    syn::Error::new_spanned(
+                        path,
                         format_args!("expected one of: {}", [$(stringify!($Variant)),*].join(", ")),
-                    ))
+                    )
+                })
             }
         }
 
@@ -2146,7 +2115,6 @@ macro_rules! impl_bounds {
         #[allow(non_snake_case)]
         $vis struct $struct_type {
             $($vis $Variant: Option<known_items::$Variant>,)*
-            $($vis $Unknown: Vec<syn::TypeParamBound>,)?
         }
 
         impl ToTokens for $struct_type {
@@ -2158,63 +2126,42 @@ macro_rules! impl_bounds {
                     separator = Some(<Token![+]>::default());
                     v.to_tokens(tokens);
                 })*
-                $(for v in &self.$Unknown {
-                    separator.to_tokens(tokens);
-                    separator = Some(<Token![+]>::default());
-                    v.to_tokens(tokens);
-                })*
             }
         }
 
         const _: () = {
             #[derive(Clone, Debug)]
-            #[allow(non_snake_case)]
-            $vis struct Iter {
-                $($Variant: Option<known_items::$Variant>,)*
-                $($Unknown: std::vec::IntoIter<syn::TypeParamBound>,)?
-            }
+            $vis struct Iter($vis $struct_type);
 
             impl IntoIterator for $struct_type {
                 type Item = $enum_type;
                 type IntoIter = Iter;
 
                 fn into_iter(self) -> Self::IntoIter {
-                    Iter {
-                        $($Variant: self.$Variant,)*
-                        $($Unknown: self.$Unknown.into_iter(),)?
-                    }
+                    Iter(self)
                 }
             }
 
             impl Iterator for Iter {
                 type Item = $enum_type;
 
+
                 fn next(&mut self) -> Option<Self::Item> {
                     $(
-                        if let Some(value) = self.$Variant.take() {
+                        if let Some(value) = self.0.$Variant.take() {
                             return Some($enum_type::$Variant(value));
                         }
                     )*
-                    $(
-                        if let Some(value) = self.$Unknown.next() {
-                            return Some($enum_type::$Unknown(value));
-                        }
-                    )?
                     None
                 }
 
                 #[allow(unused_mut, unused_variables)]
                 fn fold<B, F: FnMut(B, Self::Item) -> B>(mut self, mut init: B, mut f: F) -> B {
                     $(
-                        if let Some(value) = self.$Variant.take() {
+                        if let Some(value) = self.0.$Variant.take() {
                             init = f(init, $enum_type::$Variant(value));
                         }
                     )*
-                    $(
-                        if let Some(value) = self.$Unknown.next() {
-                            init = f(init, $enum_type::$Unknown(value));
-                        }
-                    )?
                     init
                 }
             }
@@ -2226,9 +2173,6 @@ macro_rules! impl_bounds {
                     $($enum_type::$Variant(v) => {
                         self.$Variant = Some(v);
                     })*
-                    $($enum_type::$Unknown(v) => {
-                        self.$Unknown.push(v);
-                    })?
                 });
             }
         }
@@ -2247,7 +2191,6 @@ macro_rules! impl_bounds {
                     $(if let Some(v) = v.$Variant {
                         self.$Variant = Some(v);
                     })*
-                    $(self.$Unknown.extend(v.$Unknown);)*
                 });
             }
         }
@@ -2301,8 +2244,6 @@ impl_bounds! {
         Size,
         StaticType,
         Type,
-        #[unknown]
-        Unknown,
     }
 }
 
@@ -2316,8 +2257,6 @@ impl_bounds! {
         ResetType,
         StaticType,
         Type,
-        #[unknown]
-        Unknown,
     }
 }
 
@@ -2331,7 +2270,6 @@ impl From<ParsedTypeBound> for ParsedBound {
             ParsedTypeBound::ResetType(v) => ParsedBound::ResetType(v),
             ParsedTypeBound::StaticType(v) => ParsedBound::StaticType(v),
             ParsedTypeBound::Type(v) => ParsedBound::Type(v),
-            ParsedTypeBound::Unknown(v) => ParsedBound::Unknown(v),
         }
     }
 }
@@ -2346,7 +2284,6 @@ impl From<ParsedTypeBounds> for ParsedBounds {
             ResetType,
             StaticType,
             Type,
-            Unknown,
         } = value;
         Self {
             BoolOrIntType,
@@ -2358,7 +2295,6 @@ impl From<ParsedTypeBounds> for ParsedBounds {
             Size: None,
             StaticType,
             Type,
-            Unknown,
         }
     }
 }
@@ -2394,7 +2330,6 @@ impl ParsedTypeBound {
                 ParsedTypeBound::Type(known_items::Type(span)),
             ]),
             Self::Type(v) => ParsedTypeBounds::from_iter([ParsedTypeBound::from(v)]),
-            Self::Unknown(v) => ParsedTypeBounds::from_iter([ParsedTypeBound::Unknown(v)]),
         }
     }
 }
@@ -2429,7 +2364,6 @@ impl From<ParsedSizeTypeBounds> for ParsedBounds {
             Size,
             StaticType: None,
             Type: None,
-            Unknown: vec![],
         }
     }
 }
@@ -2457,7 +2391,6 @@ impl ParsedBounds {
     fn categorize(self, errors: &mut Errors, span: Span) -> ParsedBoundsCategory {
         let mut type_bounds = None;
         let mut size_type_bounds = None;
-        let mut unknown_bounds = vec![];
         self.into_iter().for_each(|bound| match bound.categorize() {
             ParsedBoundCategory::Type(bound) => {
                 type_bounds
@@ -2469,37 +2402,15 @@ impl ParsedBounds {
                     .get_or_insert_with(ParsedSizeTypeBounds::default)
                     .extend([bound]);
             }
-            ParsedBoundCategory::Unknown(bound) => unknown_bounds.push(bound),
         });
-        match (type_bounds, size_type_bounds, unknown_bounds.is_empty()) {
-            (None, None, true) => ParsedBoundsCategory::Type(ParsedTypeBounds {
+        match (type_bounds, size_type_bounds) {
+            (None, None) => ParsedBoundsCategory::Type(ParsedTypeBounds {
                 Type: Some(known_items::Type(span)),
                 ..Default::default()
             }),
-            (None, None, false) => {
-                errors.error(
-                    unknown_bounds.remove(0),
-                    "unknown bounds: must use at least one known bound (such as `Type`) with any unknown bounds",
-                );
-                ParsedBoundsCategory::Type(ParsedTypeBounds {
-                    Unknown: unknown_bounds,
-                    ..Default::default()
-                })
-            }
-            (None, Some(bounds), true) => ParsedBoundsCategory::SizeType(bounds),
-            (None, Some(bounds), false) => {
-                // TODO: implement
-                errors.error(
-                    unknown_bounds.remove(0),
-                    "unknown bounds with `Size` bounds are not implemented",
-                );
-                ParsedBoundsCategory::SizeType(bounds)
-            }
-            (Some(bounds), None, _) => ParsedBoundsCategory::Type(ParsedTypeBounds {
-                Unknown: unknown_bounds,
-                ..bounds
-            }),
-            (Some(type_bounds), Some(size_type_bounds), _) => {
+            (None, Some(bounds)) => ParsedBoundsCategory::SizeType(bounds),
+            (Some(bounds), None) => ParsedBoundsCategory::Type(bounds),
+            (Some(type_bounds), Some(size_type_bounds)) => {
                 errors.error(
                     size_type_bounds
                         .Size
@@ -2516,7 +2427,6 @@ impl ParsedBounds {
 pub(crate) enum ParsedBoundCategory {
     Type(ParsedTypeBound),
     SizeType(ParsedSizeTypeBound),
-    Unknown(syn::TypeParamBound),
 }
 
 impl ParsedBound {
@@ -2531,14 +2441,12 @@ impl ParsedBound {
             Self::Size(v) => ParsedBoundCategory::SizeType(ParsedSizeTypeBound::Size(v)),
             Self::StaticType(v) => ParsedBoundCategory::Type(ParsedTypeBound::StaticType(v)),
             Self::Type(v) => ParsedBoundCategory::Type(ParsedTypeBound::Type(v)),
-            Self::Unknown(v) => ParsedBoundCategory::Unknown(v),
         }
     }
     fn implied_bounds(self) -> ParsedBounds {
         match self.categorize() {
             ParsedBoundCategory::Type(v) => v.implied_bounds().into(),
             ParsedBoundCategory::SizeType(v) => v.implied_bounds().into(),
-            ParsedBoundCategory::Unknown(v) => ParsedBounds::from_iter([ParsedBound::Unknown(v)]),
         }
     }
 }
@@ -3417,7 +3325,7 @@ impl ParsedGenerics {
                                 | ParsedTypeBound::EnumType(_)
                                 | ParsedTypeBound::IntType(_)
                                 | ParsedTypeBound::ResetType(_) => {
-                                    errors.error(bound, "bounds on mask types are not implemented");
+                                    errors.error(bound, "bound on mask type not implemented");
                                 }
                                 ParsedTypeBound::StaticType(bound) => {
                                     if bounds.StaticType.is_none() {
@@ -3429,12 +3337,6 @@ impl ParsedGenerics {
                                     }
                                 }
                                 ParsedTypeBound::Type(_) => {}
-                                ParsedTypeBound::Unknown(_) => {
-                                    errors.error(
-                                        bound,
-                                        "unknown bounds on mask types are not implemented",
-                                    );
-                                }
                             }
                         }
                         bounds.add_implied_bounds();
diff --git a/crates/fayalite-proc-macros-impl/src/lib.rs b/crates/fayalite-proc-macros-impl/src/lib.rs
index 6ba177b..1b1b61f 100644
--- a/crates/fayalite-proc-macros-impl/src/lib.rs
+++ b/crates/fayalite-proc-macros-impl/src/lib.rs
@@ -1210,29 +1210,17 @@ fn hdl_main(
     attr: TokenStream,
     item: TokenStream,
 ) -> syn::Result<TokenStream> {
-    fn parse_evaluated_cfgs_attr<R>(
-        input: ParseStream,
-        parse_inner: impl FnOnce(ParseStream) -> syn::Result<R>,
-    ) -> syn::Result<R> {
-        let _: Token![#] = input.parse()?;
-        let bracket_content;
-        bracketed!(bracket_content in input);
-        let _: kw::__evaluated_cfgs = bracket_content.parse()?;
-        let paren_content;
-        parenthesized!(paren_content in bracket_content);
-        parse_inner(&paren_content)
-    }
-    let (evaluated_cfgs, item): (_, TokenStream) = Parser::parse2(
+    let (evaluated_cfgs, attr): (_, TokenStream) = Parser::parse2(
         |input: ParseStream| {
-            let peek = input.fork();
-            if parse_evaluated_cfgs_attr(&peek, |_| Ok(())).is_ok() {
-                let evaluated_cfgs = parse_evaluated_cfgs_attr(input, Cfgs::<bool>::parse)?;
-                Ok((Some(evaluated_cfgs), input.parse()?))
+            if input.peek(Bracket) && input.peek2(kw::__evaluated_cfgs) {
+                let cfgs = input.parse()?;
+                let _: kw::__evaluated_cfgs = input.parse()?;
+                Ok((Some(cfgs), input.parse()?))
             } else {
                 Ok((None, input.parse()?))
             }
         },
-        item,
+        attr,
     )?;
     let cfgs = if let Some(cfgs) = evaluated_cfgs {
         cfgs
@@ -1241,11 +1229,12 @@ fn hdl_main(
         if cfgs.cfgs_list.is_empty() {
             Cfgs::default()
         } else {
+            let key = kw::__evaluated_cfgs::default();
             return Ok(quote! {
                 ::fayalite::__cfg_expansion_helper! {
                     []
                     #cfgs
-                    {#[::fayalite::#kw(#attr)]} { #item }
+                    #[::fayalite::#kw:(#key #attr)] { #item }
                 }
             });
         }
diff --git a/crates/fayalite-proc-macros-impl/src/module/transform_body.rs b/crates/fayalite-proc-macros-impl/src/module/transform_body.rs
index c67f8dc..6e99e87 100644
--- a/crates/fayalite-proc-macros-impl/src/module/transform_body.rs
+++ b/crates/fayalite-proc-macros-impl/src/module/transform_body.rs
@@ -1109,7 +1109,7 @@ fn parse_quote_let_pat<T, R: ToTokens, C: Borrow<Token![:]>>(
     }
 }
 
-pub(crate) fn wrap_ty_with_expr(ty: impl ToTokens) -> Type {
+fn wrap_ty_with_expr(ty: impl ToTokens) -> Type {
     parse_quote_spanned! {ty.span()=>
         ::fayalite::expr::Expr<#ty>
     }
@@ -1586,7 +1586,7 @@ impl Visitor<'_> {
     }
 }
 
-pub(crate) fn empty_let() -> Local {
+fn empty_let() -> Local {
     Local {
         attrs: vec![],
         let_token: Default::default(),
@@ -1672,7 +1672,7 @@ impl Fold for Visitor<'_> {
         }
     }
 
-    fn fold_local(&mut self, mut let_stmt: Local) -> Local {
+    fn fold_local(&mut self, let_stmt: Local) -> Local {
         match self
             .errors
             .ok(HdlAttr::<Nothing, kw::hdl>::parse_and_leave_attr(
@@ -1682,25 +1682,6 @@ impl Fold for Visitor<'_> {
             Some(None) => return fold_local(self, let_stmt),
             Some(Some(HdlAttr { .. })) => {}
         };
-        let mut pat = &let_stmt.pat;
-        if let Pat::Type(pat_type) = pat {
-            pat = &pat_type.pat;
-        }
-        let Pat::Ident(syn::PatIdent {
-            attrs: _,
-            by_ref: None,
-            mutability: _,
-            ident: _,
-            subpat: None,
-        }) = pat
-        else {
-            let hdl_attr = HdlAttr::<Nothing, kw::hdl>::parse_and_take_attr(&mut let_stmt.attrs)
-                .ok()
-                .flatten()
-                .expect("already checked above");
-            let let_stmt = fold_local(self, let_stmt);
-            return self.process_hdl_let_pat(hdl_attr, let_stmt);
-        };
         let hdl_let = syn::parse2::<HdlLet<HdlLetKind<Type>>>(let_stmt.into_token_stream());
         let Some(hdl_let) = self.errors.ok(hdl_let) else {
             return empty_let();
diff --git a/crates/fayalite-proc-macros-impl/src/module/transform_body/expand_match.rs b/crates/fayalite-proc-macros-impl/src/module/transform_body/expand_match.rs
index f1ff2c2..1d53104 100644
--- a/crates/fayalite-proc-macros-impl/src/module/transform_body/expand_match.rs
+++ b/crates/fayalite-proc-macros-impl/src/module/transform_body/expand_match.rs
@@ -3,111 +3,22 @@
 use crate::{
     fold::{impl_fold, DoFold},
     kw,
-    module::transform_body::{empty_let, with_debug_clone_and_fold, wrap_ty_with_expr, Visitor},
+    module::transform_body::{with_debug_clone_and_fold, Visitor},
     Errors, HdlAttr, PairsIterExt,
 };
 use proc_macro2::{Span, TokenStream};
 use quote::{format_ident, quote_spanned, ToTokens, TokenStreamExt};
-use std::collections::BTreeSet;
 use syn::{
-    fold::{fold_arm, fold_expr_match, fold_local, fold_pat, Fold},
+    fold::{fold_arm, fold_expr_match, fold_pat, Fold},
     parse::Nothing,
     parse_quote_spanned,
     punctuated::Punctuated,
     spanned::Spanned,
     token::{Brace, Paren},
-    Arm, Attribute, Expr, ExprMatch, FieldPat, Ident, Local, Member, Pat, PatIdent, PatOr,
-    PatParen, PatPath, PatRest, PatStruct, PatTuple, PatTupleStruct, PatWild, Path, PathSegment,
-    Token, TypePath,
+    Arm, Attribute, Expr, ExprMatch, FieldPat, Ident, Member, Pat, PatIdent, PatOr, PatParen,
+    PatPath, PatRest, PatStruct, PatTupleStruct, PatWild, Path, PathSegment, Token, TypePath,
 };
 
-macro_rules! visit_trait {
-    (
-        $($vis:vis fn $fn:ident($state:ident: _, $value:ident: &$Value:ty) $block:block)*
-    ) => {
-        trait VisitMatchPat<'a> {
-            $(fn $fn(&mut self, $value: &'a $Value) {
-                $fn(self, $value);
-            })*
-        }
-
-        $($vis fn $fn<'a>($state: &mut (impl ?Sized + VisitMatchPat<'a>), $value: &'a $Value) $block)*
-    };
-}
-
-visit_trait! {
-    fn visit_match_pat_binding(_state: _, v: &MatchPatBinding) {
-        let MatchPatBinding { ident: _ } = v;
-    }
-    fn visit_match_pat_wild(_state: _, v: &MatchPatWild) {
-        let MatchPatWild { underscore_token: _ } = v;
-    }
-    fn visit_match_pat_rest(_state: _, v: &MatchPatRest) {
-        let MatchPatRest { dot2_token: _ } = v;
-    }
-    fn visit_match_pat_paren(state: _, v: &MatchPatParen<MatchPat>) {
-        let MatchPatParen { paren_token: _, pat } = v;
-        state.visit_match_pat(pat);
-    }
-    fn visit_match_pat_paren_simple(state: _, v: &MatchPatParen<MatchPatSimple>) {
-        let MatchPatParen { paren_token: _, pat } = v;
-        state.visit_match_pat_simple(pat);
-    }
-    fn visit_match_pat_or(state: _, v: &MatchPatOr<MatchPat>) {
-        let MatchPatOr { leading_vert: _, cases } = v;
-        for v in cases {
-            state.visit_match_pat(v);
-        }
-    }
-    fn visit_match_pat_or_simple(state: _, v: &MatchPatOr<MatchPatSimple>) {
-        let MatchPatOr { leading_vert: _, cases } = v;
-        for v in cases {
-            state.visit_match_pat_simple(v);
-        }
-    }
-    fn visit_match_pat_struct_field(state: _, v: &MatchPatStructField) {
-        let MatchPatStructField { field_name: _, colon_token: _, pat } = v;
-        state.visit_match_pat_simple(pat);
-    }
-    fn visit_match_pat_struct(state: _, v: &MatchPatStruct) {
-        let MatchPatStruct { match_span: _, path: _, brace_token: _, fields, rest: _ } = v;
-        for v in fields {
-            state.visit_match_pat_struct_field(v);
-        }
-    }
-    fn visit_match_pat_tuple(state: _, v: &MatchPatTuple) {
-        let MatchPatTuple { paren_token: _, fields } = v;
-        for v in fields {
-            state.visit_match_pat_simple(v);
-        }
-    }
-    fn visit_match_pat_enum_variant(state: _, v: &MatchPatEnumVariant) {
-        let MatchPatEnumVariant {match_span:_, variant_path: _, enum_path: _, variant_name: _, field } = v;
-        if let Some((_, v)) = field {
-            state.visit_match_pat_simple(v);
-        }
-    }
-    fn visit_match_pat_simple(state: _, v: &MatchPatSimple) {
-        match v {
-            MatchPatSimple::Paren(v) => state.visit_match_pat_paren_simple(v),
-            MatchPatSimple::Or(v) => state.visit_match_pat_or_simple(v),
-            MatchPatSimple::Binding(v) => state.visit_match_pat_binding(v),
-            MatchPatSimple::Wild(v) => state.visit_match_pat_wild(v),
-            MatchPatSimple::Rest(v) => state.visit_match_pat_rest(v),
-        }
-    }
-    fn visit_match_pat(state: _, v: &MatchPat) {
-        match v {
-            MatchPat::Simple(v) => state.visit_match_pat_simple(v),
-            MatchPat::Or(v) => state.visit_match_pat_or(v),
-            MatchPat::Paren(v) => state.visit_match_pat_paren(v),
-            MatchPat::Struct(v) => state.visit_match_pat_struct(v),
-            MatchPat::Tuple(v) => state.visit_match_pat_tuple(v),
-            MatchPat::EnumVariant(v) => state.visit_match_pat_enum_variant(v),
-        }
-    }
-}
-
 with_debug_clone_and_fold! {
     struct MatchPatBinding<> {
         ident: Ident,
@@ -142,15 +53,6 @@ with_debug_clone_and_fold! {
     }
 }
 
-impl<P> MatchPatOr<P> {
-    /// returns the first `|` between two patterns
-    fn first_inner_vert(&self) -> Option<Token![|]> {
-        let mut pairs = self.cases.pairs();
-        pairs.next_back();
-        pairs.next().and_then(|v| v.into_tuple().1.copied())
-    }
-}
-
 impl<P: ToTokens> ToTokens for MatchPatOr<P> {
     fn to_tokens(&self, tokens: &mut TokenStream) {
         let Self {
@@ -175,19 +77,6 @@ impl ToTokens for MatchPatWild {
     }
 }
 
-with_debug_clone_and_fold! {
-    struct MatchPatRest<> {
-        dot2_token: Token![..],
-    }
-}
-
-impl ToTokens for MatchPatRest {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let Self { dot2_token } = self;
-        dot2_token.to_tokens(tokens);
-    }
-}
-
 with_debug_clone_and_fold! {
     struct MatchPatStructField<> {
         field_name: Ident,
@@ -270,25 +159,6 @@ impl ToTokens for MatchPatStruct {
     }
 }
 
-with_debug_clone_and_fold! {
-    struct MatchPatTuple<> {
-        paren_token: Paren,
-        fields: Punctuated<MatchPatSimple, Token![,]>,
-    }
-}
-
-impl ToTokens for MatchPatTuple {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let Self {
-            paren_token,
-            fields,
-        } = self;
-        paren_token.surround(tokens, |tokens| {
-            fields.to_tokens(tokens);
-        })
-    }
-}
-
 with_debug_clone_and_fold! {
     struct MatchPatEnumVariant<> {
         match_span: Span,
@@ -324,7 +194,6 @@ enum MatchPatSimple {
     Or(MatchPatOr<MatchPatSimple>),
     Binding(MatchPatBinding),
     Wild(MatchPatWild),
-    Rest(MatchPatRest),
 }
 
 impl_fold! {
@@ -333,7 +202,6 @@ impl_fold! {
         Or(MatchPatOr<MatchPatSimple>),
         Binding(MatchPatBinding),
         Wild(MatchPatWild),
-        Rest(MatchPatRest),
     }
 }
 
@@ -344,7 +212,6 @@ impl ToTokens for MatchPatSimple {
             Self::Paren(v) => v.to_tokens(tokens),
             Self::Binding(v) => v.to_tokens(tokens),
             Self::Wild(v) => v.to_tokens(tokens),
-            Self::Rest(v) => v.to_tokens(tokens),
         }
     }
 }
@@ -411,7 +278,6 @@ trait ParseMatchPat: Sized {
     fn or(v: MatchPatOr<Self>) -> Self;
     fn paren(v: MatchPatParen<Self>) -> Self;
     fn struct_(state: &mut HdlMatchParseState<'_>, v: MatchPatStruct) -> Result<Self, ()>;
-    fn tuple(state: &mut HdlMatchParseState<'_>, v: MatchPatTuple) -> Result<Self, ()>;
     fn enum_variant(state: &mut HdlMatchParseState<'_>, v: MatchPatEnumVariant)
         -> Result<Self, ()>;
     fn parse(state: &mut HdlMatchParseState<'_>, pat: Pat) -> Result<Self, ()> {
@@ -596,34 +462,7 @@ trait ParseMatchPat: Sized {
             }) => Ok(Self::simple(MatchPatSimple::Wild(MatchPatWild {
                 underscore_token,
             }))),
-            Pat::Tuple(PatTuple {
-                attrs: _,
-                paren_token,
-                elems,
-            }) => {
-                let fields = elems
-                    .into_pairs()
-                    .filter_map_pair_value(|field_pat| {
-                        if let Pat::Rest(PatRest {
-                            attrs: _,
-                            dot2_token,
-                        }) = field_pat
-                        {
-                            Some(MatchPatSimple::Rest(MatchPatRest { dot2_token }))
-                        } else {
-                            MatchPatSimple::parse(state, field_pat).ok()
-                        }
-                    })
-                    .collect();
-                Self::tuple(
-                    state,
-                    MatchPatTuple {
-                        paren_token,
-                        fields,
-                    },
-                )
-            }
-            Pat::Slice(_) | Pat::Const(_) | Pat::Lit(_) | Pat::Range(_) => {
+            Pat::Tuple(_) | Pat::Slice(_) | Pat::Const(_) | Pat::Lit(_) | Pat::Range(_) => {
                 state
                     .errors
                     .error(pat, "not yet implemented in #[hdl] patterns");
@@ -658,14 +497,6 @@ impl ParseMatchPat for MatchPatSimple {
         Err(())
     }
 
-    fn tuple(state: &mut HdlMatchParseState<'_>, v: MatchPatTuple) -> Result<Self, ()> {
-        state.errors.push(syn::Error::new(
-            v.paren_token.span.open(),
-            "matching tuples is not yet implemented inside structs/enums in #[hdl] patterns",
-        ));
-        Err(())
-    }
-
     fn enum_variant(
         state: &mut HdlMatchParseState<'_>,
         v: MatchPatEnumVariant,
@@ -684,7 +515,6 @@ enum MatchPat {
     Or(MatchPatOr<MatchPat>),
     Paren(MatchPatParen<MatchPat>),
     Struct(MatchPatStruct),
-    Tuple(MatchPatTuple),
     EnumVariant(MatchPatEnumVariant),
 }
 
@@ -694,7 +524,6 @@ impl_fold! {
         Or(MatchPatOr<MatchPat>),
         Paren(MatchPatParen<MatchPat>),
         Struct(MatchPatStruct),
-        Tuple(MatchPatTuple),
         EnumVariant(MatchPatEnumVariant),
     }
 }
@@ -716,10 +545,6 @@ impl ParseMatchPat for MatchPat {
         Ok(Self::Struct(v))
     }
 
-    fn tuple(_state: &mut HdlMatchParseState<'_>, v: MatchPatTuple) -> Result<Self, ()> {
-        Ok(Self::Tuple(v))
-    }
-
     fn enum_variant(
         _state: &mut HdlMatchParseState<'_>,
         v: MatchPatEnumVariant,
@@ -735,7 +560,6 @@ impl ToTokens for MatchPat {
             Self::Or(v) => v.to_tokens(tokens),
             Self::Paren(v) => v.to_tokens(tokens),
             Self::Struct(v) => v.to_tokens(tokens),
-            Self::Tuple(v) => v.to_tokens(tokens),
             Self::EnumVariant(v) => v.to_tokens(tokens),
         }
     }
@@ -798,6 +622,10 @@ struct RewriteAsCheckMatch {
 }
 
 impl Fold for RewriteAsCheckMatch {
+    fn fold_field_pat(&mut self, mut i: FieldPat) -> FieldPat {
+        i.colon_token = Some(Token![:](i.member.span()));
+        i
+    }
     fn fold_pat(&mut self, pat: Pat) -> Pat {
         match pat {
             Pat::Ident(mut pat_ident) => match parse_enum_ident(pat_ident.ident) {
@@ -912,30 +740,6 @@ impl Fold for RewriteAsCheckMatch {
         // don't recurse into expressions
         i
     }
-    fn fold_local(&mut self, mut let_stmt: Local) -> Local {
-        if let Some(syn::LocalInit {
-            eq_token,
-            expr: _,
-            diverge,
-        }) = let_stmt.init.take()
-        {
-            let_stmt.init = Some(syn::LocalInit {
-                eq_token,
-                expr: parse_quote_spanned! {self.span=>
-                    __match_value
-                },
-                diverge: diverge.map(|(else_, _expr)| {
-                    (
-                        else_,
-                        parse_quote_spanned! {self.span=>
-                            match __infallible {}
-                        },
-                    )
-                }),
-            });
-        }
-        fold_local(self, let_stmt)
-    }
 }
 
 struct HdlMatchParseState<'a> {
@@ -943,123 +747,7 @@ struct HdlMatchParseState<'a> {
     errors: &'a mut Errors,
 }
 
-struct HdlLetPatVisitState<'a> {
-    errors: &'a mut Errors,
-    bindings: BTreeSet<&'a Ident>,
-}
-
-impl<'a> VisitMatchPat<'a> for HdlLetPatVisitState<'a> {
-    fn visit_match_pat_binding(&mut self, v: &'a MatchPatBinding) {
-        self.bindings.insert(&v.ident);
-    }
-
-    fn visit_match_pat_or(&mut self, v: &'a MatchPatOr<MatchPat>) {
-        if let Some(first_inner_vert) = v.first_inner_vert() {
-            self.errors.error(
-                first_inner_vert,
-                "or-patterns are not supported in let statements",
-            );
-        }
-        visit_match_pat_or(self, v);
-    }
-
-    fn visit_match_pat_or_simple(&mut self, v: &'a MatchPatOr<MatchPatSimple>) {
-        if let Some(first_inner_vert) = v.first_inner_vert() {
-            self.errors.error(
-                first_inner_vert,
-                "or-patterns are not supported in let statements",
-            );
-        }
-        visit_match_pat_or_simple(self, v);
-    }
-
-    fn visit_match_pat_enum_variant(&mut self, v: &'a MatchPatEnumVariant) {
-        self.errors.error(v, "refutable pattern in let statement");
-    }
-}
-
 impl Visitor<'_> {
-    pub(crate) fn process_hdl_let_pat(
-        &mut self,
-        _hdl_attr: HdlAttr<Nothing, kw::hdl>,
-        mut let_stmt: Local,
-    ) -> Local {
-        let span = let_stmt.let_token.span();
-        if let Pat::Type(pat) = &mut let_stmt.pat {
-            *pat.ty = wrap_ty_with_expr((*pat.ty).clone());
-        }
-        let check_let_stmt = RewriteAsCheckMatch { span }.fold_local(let_stmt.clone());
-        let Local {
-            attrs: _,
-            let_token,
-            pat,
-            init,
-            semi_token,
-        } = let_stmt;
-        self.require_normal_module_or_fn(let_token);
-        let Some(syn::LocalInit {
-            eq_token,
-            expr,
-            diverge,
-        }) = init
-        else {
-            self.errors
-                .error(let_token, "#[hdl] let must be assigned a value");
-            return empty_let();
-        };
-        if let Some((else_, _)) = diverge {
-            // TODO: implement let-else
-            self.errors
-                .error(else_, "#[hdl] let ... else { ... } is not implemented");
-            return empty_let();
-        }
-        let Ok(pat) = MatchPat::parse(
-            &mut HdlMatchParseState {
-                match_span: span,
-                errors: &mut self.errors,
-            },
-            pat,
-        ) else {
-            return empty_let();
-        };
-        let mut state = HdlLetPatVisitState {
-            errors: &mut self.errors,
-            bindings: BTreeSet::new(),
-        };
-        state.visit_match_pat(&pat);
-        let HdlLetPatVisitState {
-            errors: _,
-            bindings,
-        } = state;
-        let retval = parse_quote_spanned! {span=>
-            let (#(#bindings,)* __scope,) = {
-                type __MatchTy<T> = <T as ::fayalite::ty::Type>::MatchVariant;
-                let __match_expr = ::fayalite::expr::ToExpr::to_expr(&(#expr));
-                ::fayalite::expr::check_match_expr(__match_expr, |__match_value, __infallible| {
-                    #[allow(unused_variables)]
-                    #check_let_stmt
-                    match __infallible {}
-                });
-                let mut __match_iter = ::fayalite::module::match_(__match_expr);
-                let ::fayalite::__std::option::Option::Some(__match_variant) = ::fayalite::__std::iter::Iterator::next(&mut __match_iter) else {
-                    ::fayalite::__std::unreachable!("#[hdl] let with uninhabited type");
-                };
-                let ::fayalite::__std::option::Option::None = ::fayalite::__std::iter::Iterator::next(&mut __match_iter) else {
-                    ::fayalite::__std::unreachable!("#[hdl] let with refutable pattern");
-                };
-                let (__match_variant, __scope) =
-                    ::fayalite::ty::MatchVariantAndInactiveScope::match_activate_scope(
-                        __match_variant,
-                    );
-                #let_token #pat #eq_token __match_variant #semi_token
-                (#(#bindings,)* __scope,)
-            };
-        };
-        match retval {
-            syn::Stmt::Local(retval) => retval,
-            _ => unreachable!(),
-        }
-    }
     pub(crate) fn process_hdl_match(
         &mut self,
         _hdl_attr: HdlAttr<Nothing, kw::hdl>,
diff --git a/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements.rs b/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements.rs
index 229871b..61d29b5 100644
--- a/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements.rs
+++ b/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements.rs
@@ -2,7 +2,6 @@
 // See Notices.txt for copyright information
 //! ## `#[hdl] let` statements
 
-pub mod destructuring;
 pub mod inputs_outputs;
 pub mod instances;
 pub mod memories;
diff --git a/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/destructuring.rs b/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/destructuring.rs
deleted file mode 100644
index 1fc4705..0000000
--- a/crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/destructuring.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-//! ### Destructuring Let
-//!
-//! You can use `#[hdl] let` to destructure types, similarly to Rust `let` statements with non-trivial patterns.
-//!
-//! `#[hdl] let` statements can only match one level of struct/tuple pattern for now,
-//! e.g. you can match with the pattern `MyStruct { a, b }`, but not `MyStruct { a, b: Struct2 { v } }`.
-//!
-//! ```
-//! # use fayalite::prelude::*;
-//! #[hdl]
-//! struct MyStruct {
-//!     a: UInt<8>,
-//!     b: Bool,
-//! }
-//!
-//! #[hdl_module]
-//! fn my_module() {
-//!     #[hdl]
-//!     let my_input: MyStruct = m.input();
-//!     #[hdl]
-//!     let my_output: UInt<8> = m.input();
-//!     #[hdl]
-//!     let MyStruct { a, b } = my_input;
-//!     #[hdl]
-//!     if b {
-//!         connect(my_output, a);
-//!     } else {
-//!         connect(my_output, 0_hdl_u8);
-//!     }
-//! }
-//! ```
diff --git a/crates/fayalite/src/_docs/modules/module_bodies/hdl_match_statements.rs b/crates/fayalite/src/_docs/modules/module_bodies/hdl_match_statements.rs
index 6df70f1..9e6c511 100644
--- a/crates/fayalite/src/_docs/modules/module_bodies/hdl_match_statements.rs
+++ b/crates/fayalite/src/_docs/modules/module_bodies/hdl_match_statements.rs
@@ -7,5 +7,5 @@
 //!
 //! `#[hdl] match` statements' bodies must evaluate to type `()` for now.
 //!
-//! `#[hdl] match` statements can only match one level of struct/tuple/enum pattern for now,
+//! `#[hdl] match` statements can only match one level of struct/enum pattern for now,
 //! e.g. you can match with the pattern `HdlSome(v)`, but not `HdlSome(HdlSome(_))`.
diff --git a/crates/fayalite/src/int.rs b/crates/fayalite/src/int.rs
index 5d10b29..b49ca3f 100644
--- a/crates/fayalite/src/int.rs
+++ b/crates/fayalite/src/int.rs
@@ -567,12 +567,12 @@ impl_prim_int!(i64, SInt<64>);
 impl_prim_int!(i128, SInt<128>);
 
 impl_prim_int!(
-    /// for portability reasons, [`usize`] always translates to [`UInt<64>`][type@UInt]
+    /// for portability reasons, [`usize`] always translates to [`UInt<64>`]
     usize, UInt<64>
 );
 
 impl_prim_int!(
-    /// for portability reasons, [`isize`] always translates to [`SInt<64>`][type@SInt]
+    /// for portability reasons, [`isize`] always translates to [`SInt<64>`]
     isize, SInt<64>
 );
 
diff --git a/crates/fayalite/src/lib.rs b/crates/fayalite/src/lib.rs
index 88fe169..5b5afb4 100644
--- a/crates/fayalite/src/lib.rs
+++ b/crates/fayalite/src/lib.rs
@@ -22,8 +22,7 @@ macro_rules! __cfg_expansion_helper {
             $cfg:ident($($expr:tt)*),
             $($unevaluated_cfgs:ident($($unevaluated_exprs:tt)*),)*
         ]
-        // pass as tt so we get right span for attribute
-        $after_evaluation_attr:tt $after_evaluation_body:tt
+        #[$after_evaluation:path:($($after_evaluation_attr_args:tt)*)] {$($after_evaluation_args:tt)*}
     ) => {
         #[$cfg($($expr)*)]
         $crate::__cfg_expansion_helper! {
@@ -34,7 +33,7 @@ macro_rules! __cfg_expansion_helper {
             [
                 $($unevaluated_cfgs($($unevaluated_exprs)*),)*
             ]
-            $after_evaluation_attr $after_evaluation_body
+            #[$after_evaluation:($($after_evaluation_attr_args)*)] {$($after_evaluation_args)*}
         }
         #[$cfg(not($($expr)*))]
         $crate::__cfg_expansion_helper! {
@@ -45,7 +44,7 @@ macro_rules! __cfg_expansion_helper {
             [
                 $($unevaluated_cfgs($($unevaluated_exprs)*),)*
             ]
-            $after_evaluation_attr $after_evaluation_body
+            #[$after_evaluation:($($after_evaluation_attr_args)*)] {$($after_evaluation_args)*}
         }
     };
     (
@@ -53,14 +52,12 @@ macro_rules! __cfg_expansion_helper {
             $($evaluated_cfgs:ident($($evaluated_exprs:tt)*) = $evaluated_results:ident,)*
         ]
         []
-        // don't use #[...] so we get right span for `#` and `[]` of attribute
-        {$($after_evaluation_attr:tt)*} {$($after_evaluation_body:tt)*}
+        #[$after_evaluation:path:($($after_evaluation_attr_args:tt)*)] {$($after_evaluation_args:tt)*}
     ) => {
-        $($after_evaluation_attr)*
-        #[__evaluated_cfgs([
+        #[$after_evaluation([
             $($evaluated_cfgs($($evaluated_exprs)*) = $evaluated_results,)*
-        ])]
-        $($after_evaluation_body)*
+        ] $($after_evaluation_attr_args)*)]
+        $($after_evaluation_args)*
     };
 }
 
diff --git a/crates/fayalite/src/sim.rs b/crates/fayalite/src/sim.rs
index f630f5a..cb6228d 100644
--- a/crates/fayalite/src/sim.rs
+++ b/crates/fayalite/src/sim.rs
@@ -4773,9 +4773,6 @@ impl Compiler {
             }
             self.insns.extend(insns.iter().copied(), *source_location);
         }
-        for CondStackEntry { cond: _, end_label } in cond_stack {
-            self.insns.define_label_at_next_insn(end_label);
-        }
     }
     fn process_clocks(&mut self) -> Interned<[StatePartIndex<StatePartKindSmallSlots>]> {
         mem::take(&mut self.clock_triggers)
diff --git a/crates/fayalite/src/sim/vcd.rs b/crates/fayalite/src/sim/vcd.rs
index fde30be..b8248e3 100644
--- a/crates/fayalite/src/sim/vcd.rs
+++ b/crates/fayalite/src/sim/vcd.rs
@@ -5,7 +5,6 @@ use crate::{
     enum_::{Enum, EnumType},
     expr::Flow,
     int::UInt,
-    intern::{Intern, Interned},
     sim::{
         time::{SimDuration, SimInstant},
         TraceArray, TraceAsyncReset, TraceBool, TraceBundle, TraceClock, TraceDecl,
@@ -16,73 +15,12 @@ use crate::{
     },
 };
 use bitvec::{order::Lsb0, slice::BitSlice};
-use hashbrown::{hash_map::Entry, HashMap};
 use std::{
-    fmt::{self, Write as _},
-    io, mem,
+    fmt,
+    io::{self, Write},
+    mem,
 };
 
-#[derive(Default)]
-struct Scope {
-    last_inserted: HashMap<Interned<str>, usize>,
-}
-
-#[derive(Copy, Clone)]
-struct VerilogIdentifier {
-    unescaped_name: Interned<str>,
-}
-
-impl VerilogIdentifier {
-    fn needs_escape(self) -> bool {
-        // we only allow ascii, so we can just check bytes
-        let Some((&first, rest)) = self.unescaped_name.as_bytes().split_first() else {
-            unreachable!("Scope::new_identifier guarantees a non-empty name");
-        };
-        if !first.is_ascii_alphabetic() && first != b'_' {
-            true
-        } else {
-            rest.iter()
-                .any(|&ch| !ch.is_ascii_alphanumeric() && ch != b'_' && ch != b'$')
-        }
-    }
-}
-
-impl fmt::Display for VerilogIdentifier {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        if self.needs_escape() {
-            f.write_str("\\")?;
-        }
-        write!(f, "{}", Escaped(self.unescaped_name))
-    }
-}
-
-impl Scope {
-    fn new_identifier(&mut self, unescaped_name: Interned<str>) -> VerilogIdentifier {
-        let next_disambiguator = match self.last_inserted.entry(unescaped_name) {
-            Entry::Vacant(entry) => {
-                entry.insert(1);
-                return VerilogIdentifier { unescaped_name };
-            }
-            Entry::Occupied(entry) => entry.get() + 1,
-        };
-        let mut disambiguated_name = String::from(&*unescaped_name);
-        for disambiguator in next_disambiguator.. {
-            disambiguated_name.truncate(unescaped_name.len());
-            write!(disambiguated_name, "_{disambiguator}").expect("can't fail");
-            if let Entry::Vacant(entry) = self.last_inserted.entry((*disambiguated_name).intern()) {
-                let retval = VerilogIdentifier {
-                    unescaped_name: *entry.key(),
-                };
-                entry.insert(1);
-                // speed up future searches
-                self.last_inserted.insert(unescaped_name, disambiguator);
-                return retval;
-            }
-        }
-        panic!("too many names");
-    }
-}
-
 pub struct VcdWriterDecls<W: io::Write + 'static> {
     writer: W,
     timescale: SimDuration,
@@ -159,20 +97,14 @@ impl<W: io::Write> fmt::Debug for VcdWriterDecls<W> {
     }
 }
 
-/// pass in scope to ensure it's not available in child scope
 fn write_vcd_scope<W: io::Write, R>(
     writer: &mut W,
     scope_type: &str,
-    scope_name: Interned<str>,
-    scope: &mut Scope,
-    f: impl FnOnce(&mut W, &mut Scope) -> io::Result<R>,
+    scope_name: &str,
+    f: impl FnOnce(&mut W) -> io::Result<R>,
 ) -> io::Result<R> {
-    writeln!(
-        writer,
-        "$scope {scope_type} {} $end",
-        scope.new_identifier(scope_name),
-    )?;
-    let retval = f(writer, &mut Scope::default())?;
+    writeln!(writer, "$scope {scope_type} {scope_name} $end")?;
+    let retval = f(writer)?;
     writeln!(writer, "$upscope $end")?;
     Ok(retval)
 }
@@ -211,28 +143,24 @@ trait_arg! {
 
 struct ArgModule<'a> {
     properties: &'a mut VcdWriterProperties,
-    scope: &'a mut Scope,
 }
 
 impl<'a> ArgModule<'a> {
     fn reborrow(&mut self) -> ArgModule<'_> {
         ArgModule {
             properties: self.properties,
-            scope: self.scope,
         }
     }
 }
 
 struct ArgModuleBody<'a> {
     properties: &'a mut VcdWriterProperties,
-    scope: &'a mut Scope,
 }
 
 impl<'a> ArgModuleBody<'a> {
     fn reborrow(&mut self) -> ArgModuleBody<'_> {
         ArgModuleBody {
             properties: self.properties,
-            scope: self.scope,
         }
     }
 }
@@ -242,7 +170,6 @@ struct ArgInType<'a> {
     sink_var_type: &'static str,
     duplex_var_type: &'static str,
     properties: &'a mut VcdWriterProperties,
-    scope: &'a mut Scope,
 }
 
 impl<'a> ArgInType<'a> {
@@ -252,7 +179,6 @@ impl<'a> ArgInType<'a> {
             sink_var_type: self.sink_var_type,
             duplex_var_type: self.duplex_var_type,
             properties: self.properties,
-            scope: self.scope,
         }
     }
 }
@@ -300,42 +226,55 @@ fn write_vcd_id<W: io::Write>(writer: &mut W, mut id: usize) -> io::Result<()> {
     Ok(())
 }
 
-struct Escaped<T: fmt::Display>(T);
-
-impl<T: fmt::Display> fmt::Display for Escaped<T> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        // escaping rules from function GTKWave uses to decode VCD strings:
-        // https://github.com/gtkwave/gtkwave/blob/491f24d7e8619cfc1fcc65704ee5c967d1083c18/lib/libfst/fstapi.c#L7090
-        struct Wrapper<W>(W);
-        impl<W: fmt::Write> fmt::Write for Wrapper<W> {
-            fn write_str(&mut self, s: &str) -> fmt::Result {
-                for byte in s.bytes() {
-                    match byte {
-                        b'\\' | b'\'' | b'"' | b'?' => {
-                            self.0.write_str("\\")?;
-                            self.0.write_char(byte as char)?;
-                        }
-                        b'\n' => self.0.write_str(r"\n")?,
-                        b'\r' => self.0.write_str(r"\r")?,
-                        b'\t' => self.0.write_str(r"\t")?,
-                        0x7 => self.0.write_str(r"\a")?,
-                        0x8 => self.0.write_str(r"\b")?,
-                        0xC => self.0.write_str(r"\f")?,
-                        0xB => self.0.write_str(r"\v")?,
-                        _ => {
-                            if byte.is_ascii_graphic() {
-                                self.0.write_char(byte as char)?;
-                            } else {
-                                write!(self.0, r"\x{byte:02x}")?;
-                            }
+fn write_escaped<W: io::Write>(writer: &mut W, value: impl fmt::Display) -> io::Result<()> {
+    // escaping rules from function GTKWave uses to decode VCD strings:
+    // https://github.com/gtkwave/gtkwave/blob/491f24d7e8619cfc1fcc65704ee5c967d1083c18/lib/libfst/fstapi.c#L7090
+    struct Wrapper<W>(W);
+    impl<W: io::Write> io::Write for Wrapper<W> {
+        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+            if buf.is_empty() {
+                return self.0.write(buf);
+            }
+            let mut retval = 0;
+            for &byte in buf {
+                match byte {
+                    b'\\' | b'\'' | b'"' | b'?' => self.0.write_all(&[b'\\', byte])?,
+                    b'\n' => self.0.write_all(br"\n")?,
+                    b'\r' => self.0.write_all(br"\r")?,
+                    b'\t' => self.0.write_all(br"\t")?,
+                    0x7 => self.0.write_all(br"\a")?,
+                    0x8 => self.0.write_all(br"\b")?,
+                    0xC => self.0.write_all(br"\f")?,
+                    0xB => self.0.write_all(br"\v")?,
+                    _ => {
+                        if byte.is_ascii_graphic() {
+                            self.0.write_all(&[byte])?;
+                        } else {
+                            write!(self.0, r"\x{byte:02x}")?;
                         }
                     }
                 }
-                Ok(())
+                retval += 1;
             }
+            Ok(retval)
+        }
+
+        fn flush(&mut self) -> io::Result<()> {
+            self.0.flush()
         }
-        write!(Wrapper(f), "{}", self.0)
     }
+    write!(Wrapper(writer), "{value}")
+}
+
+fn is_unescaped_verilog_identifier(ident: &str) -> bool {
+    // we only allow ascii, so we can just check bytes
+    let Some((&first, rest)) = ident.as_bytes().split_first() else {
+        return false; // empty string is not an identifier
+    };
+    (first.is_ascii_alphabetic() || first == b'_')
+        && rest
+            .iter()
+            .all(|&ch| ch.is_ascii_alphanumeric() || ch == b'_' || ch == b'$')
 }
 
 fn write_vcd_var<W: io::Write>(
@@ -345,7 +284,7 @@ fn write_vcd_var<W: io::Write>(
     var_type: &str,
     size: usize,
     location: TraceLocation,
-    name: VerilogIdentifier,
+    name: &str,
 ) -> io::Result<()> {
     let id = match location {
         TraceLocation::Scalar(id) => id.as_usize(),
@@ -380,7 +319,12 @@ fn write_vcd_var<W: io::Write>(
     };
     write!(writer, "$var {var_type} {size} ")?;
     write_vcd_id(writer, id)?;
-    writeln!(writer, " {name} $end")
+    writer.write_all(b" ")?;
+    if !is_unescaped_verilog_identifier(name) {
+        writer.write_all(b"\\")?;
+    }
+    write_escaped(writer, name)?;
+    writer.write_all(b" $end\n")
 }
 
 impl WriteTrace for TraceUInt {
@@ -390,7 +334,6 @@ impl WriteTrace for TraceUInt {
             sink_var_type,
             duplex_var_type,
             properties,
-            scope,
         } = arg.in_type();
         let Self {
             location,
@@ -413,7 +356,7 @@ impl WriteTrace for TraceUInt {
             var_type,
             ty.width(),
             location,
-            scope.new_identifier(name),
+            &name,
         )
     }
 }
@@ -478,7 +421,6 @@ impl WriteTrace for TraceEnumDiscriminant {
             sink_var_type: _,
             duplex_var_type: _,
             properties,
-            scope,
         } = arg.in_type();
         let Self {
             location,
@@ -493,7 +435,7 @@ impl WriteTrace for TraceEnumDiscriminant {
             "string",
             1,
             location,
-            scope.new_identifier(name),
+            &name,
         )
     }
 }
@@ -565,11 +507,11 @@ impl WriteTrace for TraceScope {
 
 impl WriteTrace for TraceModule {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModule { properties, scope } = arg.module();
+        let ArgModule { properties } = arg.module();
         let Self { name, children } = self;
-        write_vcd_scope(writer, "module", name, scope, |writer, scope| {
+        write_vcd_scope(writer, "module", &name, |writer| {
             for child in children {
-                child.write_trace(writer, ArgModuleBody { properties, scope })?;
+                child.write_trace(writer, ArgModuleBody { properties })?;
             }
             Ok(())
         })
@@ -578,7 +520,7 @@ impl WriteTrace for TraceModule {
 
 impl WriteTrace for TraceInstance {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModuleBody { properties, scope } = arg.module_body();
+        let ArgModuleBody { properties } = arg.module_body();
         let Self {
             name: _,
             instance_io,
@@ -592,16 +534,15 @@ impl WriteTrace for TraceInstance {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope,
             },
         )?;
-        module.write_trace(writer, ArgModule { properties, scope })
+        module.write_trace(writer, ArgModule { properties })
     }
 }
 
 impl WriteTrace for TraceMem {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModuleBody { properties, scope } = arg.module_body();
+        let ArgModuleBody { properties } = arg.module_body();
         let Self {
             id,
             name,
@@ -610,41 +551,27 @@ impl WriteTrace for TraceMem {
             ports,
             array_type,
         } = self;
-        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
-            write_vcd_scope(
-                writer,
-                "struct",
-                "contents".intern(),
-                scope,
-                |writer, scope| {
-                    for element_index in 0..array_type.len() {
-                        write_vcd_scope(
+        write_vcd_scope(writer, "struct", &*name, |writer| {
+            write_vcd_scope(writer, "struct", "contents", |writer| {
+                for element_index in 0..array_type.len() {
+                    write_vcd_scope(writer, "struct", &format!("[{element_index}]"), |writer| {
+                        properties.memory_properties[id.as_usize()].element_index = element_index;
+                        properties.memory_properties[id.as_usize()].element_part_index = 0;
+                        element_type.write_trace(
                             writer,
-                            "struct",
-                            Intern::intern_owned(format!("[{element_index}]")),
-                            scope,
-                            |writer, scope| {
-                                properties.memory_properties[id.as_usize()].element_index =
-                                    element_index;
-                                properties.memory_properties[id.as_usize()].element_part_index = 0;
-                                element_type.write_trace(
-                                    writer,
-                                    ArgInType {
-                                        source_var_type: "reg",
-                                        sink_var_type: "reg",
-                                        duplex_var_type: "reg",
-                                        properties,
-                                        scope,
-                                    },
-                                )
+                            ArgInType {
+                                source_var_type: "reg",
+                                sink_var_type: "reg",
+                                duplex_var_type: "reg",
+                                properties,
                             },
-                        )?;
-                    }
-                    Ok(())
-                },
-            )?;
+                        )
+                    })?;
+                }
+                Ok(())
+            })?;
             for port in ports {
-                port.write_trace(writer, ArgModuleBody { properties, scope })?;
+                port.write_trace(writer, ArgModuleBody { properties })?;
             }
             Ok(())
         })
@@ -653,7 +580,7 @@ impl WriteTrace for TraceMem {
 
 impl WriteTrace for TraceMemPort {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModuleBody { properties, scope } = arg.module_body();
+        let ArgModuleBody { properties } = arg.module_body();
         let Self {
             name: _,
             bundle,
@@ -666,7 +593,6 @@ impl WriteTrace for TraceMemPort {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope,
             },
         )
     }
@@ -674,7 +600,7 @@ impl WriteTrace for TraceMemPort {
 
 impl WriteTrace for TraceWire {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModuleBody { properties, scope } = arg.module_body();
+        let ArgModuleBody { properties } = arg.module_body();
         let Self {
             name: _,
             child,
@@ -687,7 +613,6 @@ impl WriteTrace for TraceWire {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope,
             },
         )
     }
@@ -695,7 +620,7 @@ impl WriteTrace for TraceWire {
 
 impl WriteTrace for TraceReg {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModuleBody { properties, scope } = arg.module_body();
+        let ArgModuleBody { properties } = arg.module_body();
         let Self {
             name: _,
             child,
@@ -708,7 +633,6 @@ impl WriteTrace for TraceReg {
                 sink_var_type: "reg",
                 duplex_var_type: "reg",
                 properties,
-                scope,
             },
         )
     }
@@ -716,7 +640,7 @@ impl WriteTrace for TraceReg {
 
 impl WriteTrace for TraceModuleIO {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModuleBody { properties, scope } = arg.module_body();
+        let ArgModuleBody { properties } = arg.module_body();
         let Self {
             name: _,
             child,
@@ -730,7 +654,6 @@ impl WriteTrace for TraceModuleIO {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope,
             },
         )
     }
@@ -738,31 +661,16 @@ impl WriteTrace for TraceModuleIO {
 
 impl WriteTrace for TraceBundle {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgInType {
-            source_var_type,
-            sink_var_type,
-            duplex_var_type,
-            properties,
-            scope,
-        } = arg.in_type();
+        let mut arg = arg.in_type();
         let Self {
             name,
             fields,
             ty: _,
             flow: _,
         } = self;
-        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
+        write_vcd_scope(writer, "struct", &name, |writer| {
             for field in fields {
-                field.write_trace(
-                    writer,
-                    ArgInType {
-                        source_var_type,
-                        sink_var_type,
-                        duplex_var_type,
-                        properties,
-                        scope,
-                    },
-                )?;
+                field.write_trace(writer, arg.reborrow())?;
             }
             Ok(())
         })
@@ -771,31 +679,16 @@ impl WriteTrace for TraceBundle {
 
 impl WriteTrace for TraceArray {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgInType {
-            source_var_type,
-            sink_var_type,
-            duplex_var_type,
-            properties,
-            scope,
-        } = arg.in_type();
+        let mut arg = arg.in_type();
         let Self {
             name,
             elements,
             ty: _,
             flow: _,
         } = self;
-        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
+        write_vcd_scope(writer, "struct", &name, |writer| {
             for element in elements {
-                element.write_trace(
-                    writer,
-                    ArgInType {
-                        source_var_type,
-                        sink_var_type,
-                        duplex_var_type,
-                        properties,
-                        scope,
-                    },
-                )?;
+                element.write_trace(writer, arg.reborrow())?;
             }
             Ok(())
         })
@@ -804,13 +697,7 @@ impl WriteTrace for TraceArray {
 
 impl WriteTrace for TraceEnumWithFields {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgInType {
-            source_var_type,
-            sink_var_type,
-            duplex_var_type,
-            properties,
-            scope,
-        } = arg.in_type();
+        let mut arg = arg.in_type();
         let Self {
             name,
             discriminant,
@@ -818,28 +705,10 @@ impl WriteTrace for TraceEnumWithFields {
             ty: _,
             flow: _,
         } = self;
-        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
-            discriminant.write_trace(
-                writer,
-                ArgInType {
-                    source_var_type,
-                    sink_var_type,
-                    duplex_var_type,
-                    properties,
-                    scope,
-                },
-            )?;
+        write_vcd_scope(writer, "struct", &name, |writer| {
+            discriminant.write_trace(writer, arg.reborrow())?;
             for field in non_empty_fields {
-                field.write_trace(
-                    writer,
-                    ArgInType {
-                        source_var_type,
-                        sink_var_type,
-                        duplex_var_type,
-                        properties,
-                        scope,
-                    },
-                )?;
+                field.write_trace(writer, arg.reborrow())?;
             }
             Ok(())
         })
@@ -875,7 +744,6 @@ impl<W: io::Write> TraceWriterDecls for VcdWriterDecls<W> {
             &mut writer,
             ArgModule {
                 properties: &mut properties,
-                scope: &mut Scope::default(),
             },
         )?;
         writeln!(writer, "$enddefinitions $end")?;
@@ -930,7 +798,9 @@ fn write_string_value_change(
     value: impl fmt::Display,
     id: usize,
 ) -> io::Result<()> {
-    write!(writer, "s{} ", Escaped(value))?;
+    writer.write_all(b"s")?;
+    write_escaped(writer, value)?;
+    writer.write_all(b" ")?;
     write_vcd_id(writer, id)?;
     writer.write_all(b"\n")
 }
@@ -1076,49 +946,3 @@ impl<W: io::Write> fmt::Debug for VcdWriter<W> {
             .finish_non_exhaustive()
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_scope() {
-        let mut scope = Scope::default();
-        assert_eq!(&*scope.new_identifier("foo".intern()).unescaped_name, "foo");
-        assert_eq!(
-            &*scope.new_identifier("foo_0".intern()).unescaped_name,
-            "foo_0"
-        );
-        assert_eq!(
-            &*scope.new_identifier("foo_1".intern()).unescaped_name,
-            "foo_1"
-        );
-        assert_eq!(
-            &*scope.new_identifier("foo_3".intern()).unescaped_name,
-            "foo_3"
-        );
-        assert_eq!(
-            &*scope.new_identifier("foo".intern()).unescaped_name,
-            "foo_2"
-        );
-        assert_eq!(
-            &*scope.new_identifier("foo".intern()).unescaped_name,
-            "foo_4"
-        );
-        assert_eq!(
-            &*scope.new_identifier("foo_0".intern()).unescaped_name,
-            "foo_0_2"
-        );
-        assert_eq!(
-            &*scope.new_identifier("foo_1".intern()).unescaped_name,
-            "foo_1_2"
-        );
-        for i in 5..1000u64 {
-            // verify it actually picks the next available identifier with no skips or duplicates
-            assert_eq!(
-                *scope.new_identifier("foo".intern()).unescaped_name,
-                format!("foo_{i}"),
-            );
-        }
-    }
-}
diff --git a/crates/fayalite/src/util/ready_valid.rs b/crates/fayalite/src/util/ready_valid.rs
index ac08a64..82d3f1e 100644
--- a/crates/fayalite/src/util/ready_valid.rs
+++ b/crates/fayalite/src/util/ready_valid.rs
@@ -49,18 +49,6 @@ impl<T: Type> ReadyValid<T> {
     }
 }
 
-/// This debug port is only meant to assist the formal proof of the queue.
-#[cfg(test)]
-#[doc(hidden)]
-#[hdl]
-pub struct QueueDebugPort<Element, Index> {
-    #[hdl(flip)]
-    index_to_check: Index,
-    stored: Element,
-    inp_index: Index,
-    out_index: Index,
-}
-
 #[hdl_module]
 pub fn queue<T: Type>(
     ty: T,
@@ -190,22 +178,6 @@ pub fn queue<T: Type>(
             }
         }
     }
-    // These debug ports expose some internal state during the Induction phase
-    // of Formal Verification. They are not present in normal use.
-    #[cfg(test)]
-    {
-        #[hdl]
-        let dbg: QueueDebugPort<T, UInt> = m.output(QueueDebugPort[ty][index_ty]);
-        // read the memory word currently stored at some fixed index
-        let debug_port = mem.new_read_port();
-        connect(debug_port.addr, dbg.index_to_check);
-        connect(debug_port.en, true);
-        connect(debug_port.clk, cd.clk);
-        connect(dbg.stored, debug_port.data);
-        // also expose the current read and write indices
-        connect(dbg.inp_index, inp_index_reg);
-        connect(dbg.out_index, out_index_reg);
-    }
 }
 
 #[cfg(test)]
@@ -224,23 +196,13 @@ mod tests {
             format_args!("test_queue_{capacity}_{inp_ready_is_comb}_{out_valid_is_comb}"),
             queue_test(capacity, inp_ready_is_comb, out_valid_is_comb),
             FormalMode::Prove,
-            2,
+            14,
             None,
             ExportOptions {
                 simplify_enums: Some(SimplifyEnumsKind::ReplaceWithBundleOfUInts),
                 ..ExportOptions::default()
             },
         );
-        /// Formal verification of the FIFO queue
-        ///
-        /// The strategy derives from the observation that, if we filter its
-        /// input and output streams to consider just one in every N reads and
-        /// writes (where N is the FIFO capacity), then the FIFO effectively
-        /// behaves as a one-entry FIFO.
-        ///
-        /// In particular, any counterexample of the full FIFO behaving badly
-        /// will also be caught by one of the filtered versions (one which
-        /// happens to be in phase with the offending input or output).
         #[hdl_module]
         fn queue_test(capacity: NonZeroUsize, inp_ready_is_comb: bool, out_valid_is_comb: bool) {
             #[hdl]
@@ -255,8 +217,6 @@ mod tests {
                     rst: formal_reset().to_reset(),
                 },
             );
-
-            // random input data
             #[hdl]
             let inp_data: HdlOption<UInt<8>> = wire();
             #[hdl]
@@ -265,26 +225,16 @@ mod tests {
             } else {
                 connect(inp_data, HdlNone());
             }
-
-            // assert output ready at random
             #[hdl]
             let out_ready: Bool = wire();
             connect(out_ready, any_seq(Bool));
-
-            // The current number of elements in the FIFO ranges from zero to
-            // maximum capacity, inclusive.
-            let count_ty = UInt::range_inclusive(0..=capacity.get());
-            // type for counters that wrap around at the FIFO capacity
-            let index_ty = UInt::range(0..capacity.get());
-
-            // among all entries of the FIFO internal circular memory, choose
-            // one at random to check
+            let index_ty: UInt<32> = UInt::TYPE;
             #[hdl]
-            let index_to_check = wire(index_ty);
+            let index_to_check = wire();
             connect(index_to_check, any_const(index_ty));
-            hdl_assume(clk, index_to_check.cmp_lt(capacity.get()), "");
-
-            // instantiate and connect the queue
+            let index_max = !index_ty.zero();
+            // we saturate at index_max, so only check indexes where we properly maintain position
+            hdl_assume(clk, index_to_check.cmp_ne(index_max), "");
             #[hdl]
             let dut = instance(queue(
                 UInt[ConstUsize::<8>],
@@ -295,172 +245,109 @@ mod tests {
             connect(dut.cd, cd);
             connect(dut.inp.data, inp_data);
             connect(dut.out.ready, out_ready);
+            hdl_assume(
+                clk,
+                index_to_check.cmp_ne(!Expr::ty(index_to_check).zero()),
+                "",
+            );
 
-            // Keep an independent count of words in the FIFO. Ensure that
-            // it's always correct, and never overflows.
             #[hdl]
-            let expected_count_reg = reg_builder().clock_domain(cd).reset(count_ty.zero());
+            let expected_count_reg = reg_builder().clock_domain(cd).reset(0u32);
+            #[hdl]
+            let next_expected_count = wire();
+            connect(next_expected_count, expected_count_reg);
+            connect(expected_count_reg, next_expected_count);
             #[hdl]
             if ReadyValid::firing(dut.inp) & !ReadyValid::firing(dut.out) {
-                hdl_assert(clk, expected_count_reg.cmp_ne(capacity.get()), "");
-                connect_any(expected_count_reg, expected_count_reg + 1u8);
+                connect_any(next_expected_count, expected_count_reg + 1u8);
             } else if !ReadyValid::firing(dut.inp) & ReadyValid::firing(dut.out) {
-                hdl_assert(clk, expected_count_reg.cmp_ne(count_ty.zero()), "");
-                connect_any(expected_count_reg, expected_count_reg - 1u8);
+                connect_any(next_expected_count, expected_count_reg - 1u8);
             }
-            hdl_assert(clk, expected_count_reg.cmp_eq(dut.count), "");
+            hdl_assert(cd.clk, expected_count_reg.cmp_eq(dut.count), "");
+
+            #[hdl]
+            let prev_out_ready_reg = reg_builder().clock_domain(cd).reset(!0_hdl_u3);
+            connect_any(
+                prev_out_ready_reg,
+                (prev_out_ready_reg << 1) | out_ready.cast_to(UInt[1]),
+            );
+            #[hdl]
+            let prev_inp_valid_reg = reg_builder().clock_domain(cd).reset(!0_hdl_u3);
+            connect_any(
+                prev_inp_valid_reg,
+                (prev_inp_valid_reg << 1) | HdlOption::is_some(inp_data).cast_to(UInt[1]),
+            );
+            hdl_assume(
+                clk,
+                (prev_out_ready_reg & prev_inp_valid_reg).cmp_ne(0u8),
+                "",
+            );
 
-            // keep an independent write index into the FIFO's circular buffer
             #[hdl]
             let inp_index_reg = reg_builder().clock_domain(cd).reset(index_ty.zero());
             #[hdl]
-            if ReadyValid::firing(dut.inp) {
+            let stored_inp_data_reg = reg_builder().clock_domain(cd).reset(0u8);
+
+            #[hdl]
+            if let HdlSome(data) = ReadyValid::firing_data(dut.inp) {
                 #[hdl]
-                if inp_index_reg.cmp_ne(capacity.get() - 1) {
+                if inp_index_reg.cmp_lt(index_max) {
                     connect_any(inp_index_reg, inp_index_reg + 1u8);
-                } else {
-                    connect_any(inp_index_reg, 0_hdl_u0);
+                    #[hdl]
+                    if inp_index_reg.cmp_eq(index_to_check) {
+                        connect(stored_inp_data_reg, data);
+                    }
                 }
             }
 
-            // keep an independent read index into the FIFO's circular buffer
+            #[hdl]
+            if inp_index_reg.cmp_lt(index_to_check) {
+                hdl_assert(clk, stored_inp_data_reg.cmp_eq(0u8), "");
+            }
+
             #[hdl]
             let out_index_reg = reg_builder().clock_domain(cd).reset(index_ty.zero());
             #[hdl]
-            if ReadyValid::firing(dut.out) {
+            let stored_out_data_reg = reg_builder().clock_domain(cd).reset(0u8);
+
+            #[hdl]
+            if let HdlSome(data) = ReadyValid::firing_data(dut.out) {
                 #[hdl]
-                if out_index_reg.cmp_ne(capacity.get() - 1) {
+                if out_index_reg.cmp_lt(index_max) {
                     connect_any(out_index_reg, out_index_reg + 1u8);
-                } else {
-                    connect_any(out_index_reg, 0_hdl_u0);
-                }
-            }
-
-            // filter the input data stream, predicated by the read index
-            // matching the chosen position in the FIFO's circular buffer
-            #[hdl]
-            let inp_index_matches = wire();
-            connect(inp_index_matches, inp_index_reg.cmp_eq(index_to_check));
-            #[hdl]
-            let inp_firing_data = wire();
-            connect(inp_firing_data, HdlNone());
-            #[hdl]
-            if inp_index_matches {
-                connect(inp_firing_data, ReadyValid::firing_data(dut.inp));
-            }
-
-            // filter the output data stream, predicated by the write index
-            // matching the chosen position in the FIFO's circular buffer
-            #[hdl]
-            let out_index_matches = wire();
-            connect(out_index_matches, out_index_reg.cmp_eq(index_to_check));
-            #[hdl]
-            let out_firing_data = wire();
-            connect(out_firing_data, HdlNone());
-            #[hdl]
-            if out_index_matches {
-                connect(out_firing_data, ReadyValid::firing_data(dut.out));
-            }
-
-            // Implement a one-entry FIFO and ensure its equivalence to the
-            // filtered FIFO.
-            //
-            // the holding register for our one-entry FIFO
-            #[hdl]
-            let stored_reg = reg_builder().clock_domain(cd).reset(HdlNone());
-            #[hdl]
-            match stored_reg {
-                // If the holding register is empty...
-                HdlNone => {
                     #[hdl]
-                    match inp_firing_data {
-                        // ... and we are not receiving data, then we must not
-                        // transmit any data.
-                        HdlNone => hdl_assert(clk, HdlOption::is_none(out_firing_data), ""),
-                        // If we are indeed receiving some data...
-                        HdlSome(data_in) => {
-                            #[hdl]
-                            match out_firing_data {
-                                // ... and transmitting at the same time, we
-                                // must be transmitting the input data itself,
-                                // since the holding register is empty.
-                                HdlSome(data_out) => hdl_assert(clk, data_out.cmp_eq(data_in), ""),
-                                // If we are receiving, but not transmitting,
-                                // store the received data in the holding
-                                // register.
-                                HdlNone => connect(stored_reg, HdlSome(data_in)),
-                            }
-                        }
-                    }
-                }
-                // If there is some value stored in the holding register...
-                HdlSome(stored) => {
-                    #[hdl]
-                    match out_firing_data {
-                        // ... and we are not transmitting it, we cannot
-                        // receive any more data.
-                        HdlNone => hdl_assert(clk, HdlOption::is_none(inp_firing_data), ""),
-                        // If we are transmitting a previously stored value...
-                        HdlSome(data_out) => {
-                            // ... it must be the same data we stored earlier.
-                            hdl_assert(clk, data_out.cmp_eq(stored), "");
-                            // Also, accept new data, if any. Otherwise,
-                            // let the holding register become empty.
-                            connect(stored_reg, inp_firing_data);
-                        }
+                    if out_index_reg.cmp_eq(index_to_check) {
+                        connect(stored_out_data_reg, data);
                     }
                 }
             }
 
-            // from now on, some extra assertions in order to pass induction
-
-            // sync the holding register, when it's occupied, to the
-            // corresponding entry in the FIFO's circular buffer
-            connect(dut.dbg.index_to_check, index_to_check);
             #[hdl]
-            if let HdlSome(stored) = stored_reg {
-                hdl_assert(clk, stored.cmp_eq(dut.dbg.stored), "");
+            if out_index_reg.cmp_lt(index_to_check) {
+                hdl_assert(clk, stored_out_data_reg.cmp_eq(0u8), "");
             }
 
-            // sync the read and write indices
-            hdl_assert(clk, inp_index_reg.cmp_eq(dut.dbg.inp_index), "");
-            hdl_assert(clk, out_index_reg.cmp_eq(dut.dbg.out_index), "");
+            hdl_assert(clk, inp_index_reg.cmp_ge(out_index_reg), "");
 
-            // the indices should never go past the capacity, but induction
-            // doesn't know that...
-            hdl_assert(clk, inp_index_reg.cmp_lt(capacity.get()), "");
-            hdl_assert(clk, out_index_reg.cmp_lt(capacity.get()), "");
-
-            // strongly constrain the state of the holding register
-            //
-            // The holding register is full if and only if the corresponding
-            // FIFO entry was written to and not yet read. In other words, if
-            // the number of pending reads until the chosen entry is read out
-            // is greater than the current FIFO count, then the entry couldn't
-            // be in the FIFO in the first place.
             #[hdl]
-            let pending_reads: UInt = wire(index_ty);
-            // take care of wrap-around when subtracting indices, add the
-            // capacity amount to keep the result positive if necessary
-            #[hdl]
-            if index_to_check.cmp_ge(out_index_reg) {
-                connect(pending_reads, index_to_check - out_index_reg);
+            if inp_index_reg.cmp_lt(index_max) & out_index_reg.cmp_lt(index_max) {
+                hdl_assert(
+                    clk,
+                    expected_count_reg.cmp_eq(inp_index_reg - out_index_reg),
+                    "",
+                );
             } else {
-                connect(
-                    pending_reads,
-                    index_to_check + capacity.get() - out_index_reg,
+                hdl_assert(
+                    clk,
+                    expected_count_reg.cmp_ge(inp_index_reg - out_index_reg),
+                    "",
                 );
             }
-            // check whether the chosen entry is in the FIFO
+
             #[hdl]
-            let expected_stored: Bool = wire();
-            connect(expected_stored, pending_reads.cmp_lt(dut.count));
-            // sync with the state of the holding register
-            hdl_assert(
-                clk,
-                expected_stored.cmp_eq(HdlOption::is_some(stored_reg)),
-                "",
-            );
+            if inp_index_reg.cmp_gt(index_to_check) & out_index_reg.cmp_gt(index_to_check) {
+                hdl_assert(clk, stored_inp_data_reg.cmp_eq(stored_out_data_reg), "");
+            }
         }
     }
 
@@ -543,24 +430,4 @@ mod tests {
     fn test_4_true_true() {
         test_queue(NonZero::new(4).unwrap(), true, true);
     }
-
-    #[test]
-    fn test_many_false_false() {
-        test_queue(NonZero::new((2 << 16) - 5).unwrap(), false, false);
-    }
-
-    #[test]
-    fn test_many_false_true() {
-        test_queue(NonZero::new((2 << 16) - 5).unwrap(), false, true);
-    }
-
-    #[test]
-    fn test_many_true_false() {
-        test_queue(NonZero::new((2 << 16) - 5).unwrap(), true, false);
-    }
-
-    #[test]
-    fn test_many_true_true() {
-        test_queue(NonZero::new((2 << 16) - 5).unwrap(), true, true);
-    }
 }
diff --git a/crates/fayalite/tests/module.rs b/crates/fayalite/tests/module.rs
index 2f93fa5..42cc528 100644
--- a/crates/fayalite/tests/module.rs
+++ b/crates/fayalite/tests/module.rs
@@ -191,14 +191,10 @@ circuit check_array_repeat:
     };
 }
 
-pub trait UnknownTrait {}
-
-impl<T: ?Sized> UnknownTrait for T {}
-
 #[hdl_module(outline_generated)]
 pub fn check_skipped_generics<T, #[hdl(skip)] U, const N: usize, #[hdl(skip)] const M: usize>(v: U)
 where
-    T: StaticType + UnknownTrait,
+    T: StaticType,
     ConstUsize<N>: KnownSize,
     U: std::fmt::Display,
 {
@@ -4292,8 +4288,7 @@ circuit check_deduce_resets:
     };
 }
 
-// intentionally not outline_generated to ensure we get correct macro hygiene
-#[hdl_module]
+#[hdl_module(outline_generated)]
 pub fn check_cfgs<#[cfg(cfg_false_for_tests)] A: Type, #[cfg(cfg_true_for_tests)] B: Type>(
     #[cfg(cfg_false_for_tests)] a: A,
     #[cfg(cfg_true_for_tests)] b: B,
@@ -4340,88 +4335,12 @@ fn test_cfgs() {
         "/test/check_cfgs.fir": r"FIRRTL version 3.2.0
 circuit check_cfgs:
     type Ty0 = {b: UInt<8>}
-    module check_cfgs: @[the_test_file.rs 9962:1]
-        input i_b: UInt<8> @[the_test_file.rs 9979:20]
-        output o_b: UInt<8> @[the_test_file.rs 9992:24]
-        wire w: Ty0 @[the_test_file.rs 9981:25]
-        connect o_b, w.b @[the_test_file.rs 9993:9]
-        connect w.b, i_b @[the_test_file.rs 9994:9]
-",
-    };
-}
-
-#[hdl_module(outline_generated)]
-pub fn check_let_patterns() {
-    #[hdl]
-    let tuple_in: (UInt<1>, SInt<1>, Bool) = m.input();
-    #[hdl]
-    let (tuple_0, tuple_1, tuple_2) = tuple_in;
-    #[hdl]
-    let tuple_0_out: UInt<1> = m.output();
-    connect(tuple_0_out, tuple_0);
-    #[hdl]
-    let tuple_1_out: SInt<1> = m.output();
-    connect(tuple_1_out, tuple_1);
-    #[hdl]
-    let tuple_2_out: Bool = m.output();
-    connect(tuple_2_out, tuple_2);
-
-    #[hdl]
-    let test_struct_in: TestStruct<SInt<8>> = m.input();
-    #[hdl]
-    let TestStruct::<_> { a, b } = test_struct_in;
-    #[hdl]
-    let test_struct_a_out: SInt<8> = m.output();
-    connect(test_struct_a_out, a);
-    #[hdl]
-    let test_struct_b_out: UInt<8> = m.output();
-    connect(test_struct_b_out, b);
-
-    #[hdl]
-    let test_struct_2_in: TestStruct2 = m.input();
-    #[hdl]
-    let TestStruct2 { v } = test_struct_2_in;
-    #[hdl]
-    let test_struct_2_v_out: UInt<8> = m.output();
-    connect(test_struct_2_v_out, v);
-
-    #[hdl]
-    let test_struct_3_in: TestStruct3 = m.input();
-    #[hdl]
-    let TestStruct3 {} = test_struct_3_in;
-}
-
-#[test]
-fn test_let_patterns() {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let m = check_let_patterns();
-    dbg!(m);
-    #[rustfmt::skip] // work around https://github.com/rust-lang/rustfmt/issues/6161
-    assert_export_firrtl! {
-        m =>
-        "/test/check_let_patterns.fir": r"FIRRTL version 3.2.0
-circuit check_let_patterns:
-    type Ty0 = {`0`: UInt<1>, `1`: SInt<1>, `2`: UInt<1>}
-    type Ty1 = {a: SInt<8>, b: UInt<8>}
-    type Ty2 = {v: UInt<8>}
-    type Ty3 = {}
-    module check_let_patterns: @[module-XXXXXXXXXX.rs 1:1]
-        input tuple_in: Ty0 @[module-XXXXXXXXXX.rs 2:1]
-        output tuple_0_out: UInt<1> @[module-XXXXXXXXXX.rs 4:1]
-        output tuple_1_out: SInt<1> @[module-XXXXXXXXXX.rs 6:1]
-        output tuple_2_out: UInt<1> @[module-XXXXXXXXXX.rs 8:1]
-        input test_struct_in: Ty1 @[module-XXXXXXXXXX.rs 10:1]
-        output test_struct_a_out: SInt<8> @[module-XXXXXXXXXX.rs 12:1]
-        output test_struct_b_out: UInt<8> @[module-XXXXXXXXXX.rs 14:1]
-        input test_struct_2_in: Ty2 @[module-XXXXXXXXXX.rs 16:1]
-        output test_struct_2_v_out: UInt<8> @[module-XXXXXXXXXX.rs 18:1]
-        input test_struct_3_in: Ty3 @[module-XXXXXXXXXX.rs 20:1]
-        connect tuple_0_out, tuple_in.`0` @[module-XXXXXXXXXX.rs 5:1]
-        connect tuple_1_out, tuple_in.`1` @[module-XXXXXXXXXX.rs 7:1]
-        connect tuple_2_out, tuple_in.`2` @[module-XXXXXXXXXX.rs 9:1]
-        connect test_struct_a_out, test_struct_in.a @[module-XXXXXXXXXX.rs 13:1]
-        connect test_struct_b_out, test_struct_in.b @[module-XXXXXXXXXX.rs 15:1]
-        connect test_struct_2_v_out, test_struct_2_in.v @[module-XXXXXXXXXX.rs 19:1]
+    module check_cfgs: @[module-XXXXXXXXXX.rs 1:1]
+        input i_b: UInt<8> @[module-XXXXXXXXXX.rs 2:1]
+        output o_b: UInt<8> @[module-XXXXXXXXXX.rs 4:1]
+        wire w: Ty0 @[module-XXXXXXXXXX.rs 3:1]
+        connect o_b, w.b @[module-XXXXXXXXXX.rs 5:1]
+        connect w.b, i_b @[module-XXXXXXXXXX.rs 6:1]
 ",
     };
 }
diff --git a/crates/fayalite/tests/sim.rs b/crates/fayalite/tests/sim.rs
index 8c8a10f..a249235 100644
--- a/crates/fayalite/tests/sim.rs
+++ b/crates/fayalite/tests/sim.rs
@@ -1246,200 +1246,3 @@ fn test_memories3() {
         panic!();
     }
 }
-
-#[hdl_module(outline_generated)]
-pub fn duplicate_names() {
-    #[hdl]
-    let w = wire();
-    connect(w, 5u8);
-    #[hdl]
-    let w = wire();
-    connect(w, 6u8);
-}
-
-#[test]
-fn test_duplicate_names() {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let mut sim = Simulation::new(duplicate_names());
-    let mut writer = RcWriter::default();
-    sim.add_trace_writer(VcdWriterDecls::new(writer.clone()));
-    sim.advance_time(SimDuration::from_micros(1));
-    sim.flush_traces().unwrap();
-    let vcd = String::from_utf8(writer.take()).unwrap();
-    println!("####### VCD:\n{vcd}\n#######");
-    if vcd != include_str!("sim/expected/duplicate_names.vcd") {
-        panic!();
-    }
-    let sim_debug = format!("{sim:#?}");
-    println!("#######\n{sim_debug}\n#######");
-    if sim_debug != include_str!("sim/expected/duplicate_names.txt") {
-        panic!();
-    }
-}
-
-#[hdl_module(outline_generated)]
-pub fn array_rw() {
-    #[hdl]
-    let array_in: Array<UInt<8>, 16> = m.input();
-    #[hdl]
-    let array_out: Array<UInt<8>, 16> = m.output();
-    #[hdl]
-    let read_index: UInt<8> = m.input();
-    #[hdl]
-    let read_data: UInt<8> = m.output();
-    #[hdl]
-    let write_index: UInt<8> = m.input();
-    #[hdl]
-    let write_data: UInt<8> = m.input();
-    #[hdl]
-    let write_en: Bool = m.input();
-    #[hdl]
-    let array_wire = wire();
-    connect(array_wire, array_in);
-    connect(array_out, array_wire);
-    #[hdl]
-    if write_en {
-        connect(array_wire[write_index], write_data);
-    }
-    connect(read_data, array_wire[read_index]);
-}
-
-#[test]
-fn test_array_rw() {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let mut sim = Simulation::new(array_rw());
-    let mut writer = RcWriter::default();
-    sim.add_trace_writer(VcdWriterDecls::new(writer.clone()));
-    #[derive(Debug, PartialEq)]
-    struct State {
-        array_in: [u8; 16],
-        array_out: [u8; 16],
-        read_index: u8,
-        read_data: u8,
-        write_index: u8,
-        write_data: u8,
-        write_en: bool,
-    }
-    let mut states = Vec::new();
-    let array_in = [
-        0xFFu8, 0x7F, 0x3F, 0x1F, 0x0F, 0x07, 0x03, 0x01, //
-        0x00u8, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE,
-    ];
-    for i in 0..=16 {
-        states.push(State {
-            array_in,
-            array_out: array_in,
-            read_index: i,
-            read_data: array_in.get(i as usize).copied().unwrap_or(0),
-            write_index: 0,
-            write_data: 0,
-            write_en: false,
-        });
-    }
-    for i in 0..=16u8 {
-        let mut array_out = array_in;
-        let write_data = i.wrapping_mul(i);
-        if let Some(v) = array_out.get_mut(i as usize) {
-            *v = write_data;
-        }
-        states.push(State {
-            array_in,
-            array_out,
-            read_index: 0,
-            read_data: array_out[0],
-            write_index: i,
-            write_data,
-            write_en: true,
-        });
-    }
-    for (cycle, expected) in states.into_iter().enumerate() {
-        let State {
-            array_in,
-            array_out: _,
-            read_index,
-            read_data: _,
-            write_index,
-            write_data,
-            write_en,
-        } = expected;
-        sim.write(sim.io().array_in, array_in);
-        sim.write(sim.io().read_index, read_index);
-        sim.write(sim.io().write_index, write_index);
-        sim.write(sim.io().write_data, write_data);
-        sim.write(sim.io().write_en, write_en);
-        sim.advance_time(SimDuration::from_micros(1));
-        let array_out = std::array::from_fn(|index| {
-            sim.read_bool_or_int(sim.io().array_out[index])
-                .to_bigint()
-                .try_into()
-                .expect("known to be in range")
-        });
-        let read_data = sim
-            .read_bool_or_int(sim.io().read_data)
-            .to_bigint()
-            .try_into()
-            .expect("known to be in range");
-        let state = State {
-            array_in,
-            array_out,
-            read_index,
-            read_data,
-            write_index,
-            write_data,
-            write_en,
-        };
-        assert_eq!(
-            state,
-            expected,
-            "vcd:\n{}\ncycle: {cycle}",
-            String::from_utf8(writer.take()).unwrap(),
-        );
-    }
-    sim.flush_traces().unwrap();
-    let vcd = String::from_utf8(writer.take()).unwrap();
-    println!("####### VCD:\n{vcd}\n#######");
-    if vcd != include_str!("sim/expected/array_rw.vcd") {
-        panic!();
-    }
-    let sim_debug = format!("{sim:#?}");
-    println!("#######\n{sim_debug}\n#######");
-    if sim_debug != include_str!("sim/expected/array_rw.txt") {
-        panic!();
-    }
-}
-
-#[hdl_module(outline_generated)]
-pub fn conditional_assignment_last() {
-    #[hdl]
-    let i: Bool = m.input();
-    #[hdl]
-    let w = wire();
-    connect(w, true);
-    #[hdl]
-    if i {
-        connect(w, false);
-    }
-}
-
-#[test]
-fn test_conditional_assignment_last() {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let mut sim = Simulation::new(conditional_assignment_last());
-    let mut writer = RcWriter::default();
-    sim.add_trace_writer(VcdWriterDecls::new(writer.clone()));
-    sim.write(sim.io().i, false);
-    sim.advance_time(SimDuration::from_micros(1));
-    sim.write(sim.io().i, true);
-    sim.advance_time(SimDuration::from_micros(1));
-    sim.flush_traces().unwrap();
-    let vcd = String::from_utf8(writer.take()).unwrap();
-    println!("####### VCD:\n{vcd}\n#######");
-    if vcd != include_str!("sim/expected/conditional_assignment_last.vcd") {
-        panic!();
-    }
-    let sim_debug = format!("{sim:#?}");
-    println!("#######\n{sim_debug}\n#######");
-    if sim_debug != include_str!("sim/expected/conditional_assignment_last.txt") {
-        panic!();
-    }
-}
diff --git a/crates/fayalite/tests/sim/expected/array_rw.txt b/crates/fayalite/tests/sim/expected/array_rw.txt
deleted file mode 100644
index f016e72..0000000
--- a/crates/fayalite/tests/sim/expected/array_rw.txt
+++ /dev/null
@@ -1,2859 +0,0 @@
-Simulation {
-    state: State {
-        insns: Insns {
-            state_layout: StateLayout {
-                ty: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 2,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                        ],
-                        ..
-                    },
-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 54,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[0]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[1]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[2]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[3]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[4]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[5]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[6]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[7]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[8]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[9]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[10]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[11]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[12]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[13]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[14]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[15]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[0]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[1]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[2]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[3]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[4]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[5]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[6]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[7]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[8]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[9]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[10]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[11]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[12]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[13]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[14]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[15]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::read_index",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::read_data",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::write_index",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::write_data",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::write_en",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[0]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[1]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[2]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[3]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[4]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[5]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[6]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[7]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[8]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[9]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[10]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[11]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[12]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[13]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[14]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[15]",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                        ],
-                        ..
-                    },
-                },
-                memories: StatePartLayout<Memories> {
-                    len: 0,
-                    debug_data: [],
-                    layout_data: [],
-                    ..
-                },
-            },
-            insns: [
-                // at: module-XXXXXXXXXX.rs:1:1
-                0: CastBigToArrayIndex {
-                    dest: StatePartIndex<SmallSlots>(1), // (0x0 0) SlotDebugData { name: "", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(32), // (0x0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::read_index", ty: UInt<8> },
-                },
-                1: CastBigToArrayIndex {
-                    dest: StatePartIndex<SmallSlots>(0), // (0x10 16) SlotDebugData { name: "", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(34), // (0x10) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::write_index", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:10:1
-                2: Copy {
-                    dest: StatePartIndex<BigSlots>(37), // (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[0]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(0), // (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[0]", ty: UInt<8> },
-                },
-                3: Copy {
-                    dest: StatePartIndex<BigSlots>(38), // (0x7f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[1]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(1), // (0x7f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[1]", ty: UInt<8> },
-                },
-                4: Copy {
-                    dest: StatePartIndex<BigSlots>(39), // (0x3f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[2]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(2), // (0x3f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[2]", ty: UInt<8> },
-                },
-                5: Copy {
-                    dest: StatePartIndex<BigSlots>(40), // (0x1f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[3]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(3), // (0x1f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[3]", ty: UInt<8> },
-                },
-                6: Copy {
-                    dest: StatePartIndex<BigSlots>(41), // (0xf) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[4]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(4), // (0xf) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[4]", ty: UInt<8> },
-                },
-                7: Copy {
-                    dest: StatePartIndex<BigSlots>(42), // (0x7) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[5]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(5), // (0x7) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[5]", ty: UInt<8> },
-                },
-                8: Copy {
-                    dest: StatePartIndex<BigSlots>(43), // (0x3) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[6]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(6), // (0x3) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[6]", ty: UInt<8> },
-                },
-                9: Copy {
-                    dest: StatePartIndex<BigSlots>(44), // (0x1) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[7]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(7), // (0x1) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[7]", ty: UInt<8> },
-                },
-                10: Copy {
-                    dest: StatePartIndex<BigSlots>(45), // (0x0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[8]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(8), // (0x0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[8]", ty: UInt<8> },
-                },
-                11: Copy {
-                    dest: StatePartIndex<BigSlots>(46), // (0x80) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[9]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(9), // (0x80) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[9]", ty: UInt<8> },
-                },
-                12: Copy {
-                    dest: StatePartIndex<BigSlots>(47), // (0xc0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[10]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(10), // (0xc0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[10]", ty: UInt<8> },
-                },
-                13: Copy {
-                    dest: StatePartIndex<BigSlots>(48), // (0xe0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[11]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(11), // (0xe0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[11]", ty: UInt<8> },
-                },
-                14: Copy {
-                    dest: StatePartIndex<BigSlots>(49), // (0xf0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[12]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(12), // (0xf0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[12]", ty: UInt<8> },
-                },
-                15: Copy {
-                    dest: StatePartIndex<BigSlots>(50), // (0xf8) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[13]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(13), // (0xf8) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[13]", ty: UInt<8> },
-                },
-                16: Copy {
-                    dest: StatePartIndex<BigSlots>(51), // (0xfc) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[14]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(14), // (0xfc) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[14]", ty: UInt<8> },
-                },
-                17: Copy {
-                    dest: StatePartIndex<BigSlots>(52), // (0xfe) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[15]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(15), // (0xfe) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_in[15]", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:12:1
-                18: BranchIfZero {
-                    target: 20,
-                    value: StatePartIndex<BigSlots>(36), // (0x1) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::write_en", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:13:1
-                19: WriteIndexed {
-                    dest: StatePartIndex<BigSlots>(37) /* (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[0]", ty: UInt<8> } */ [StatePartIndex<SmallSlots>(0) /* (0x10 16) SlotDebugData { name: "", ty: UInt<8> } */ , len=16, stride=1],,
-                    src: StatePartIndex<BigSlots>(35), // (0x0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::write_data", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:11:1
-                20: Copy {
-                    dest: StatePartIndex<BigSlots>(16), // (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[0]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(37), // (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[0]", ty: UInt<8> },
-                },
-                21: Copy {
-                    dest: StatePartIndex<BigSlots>(17), // (0x7f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[1]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(38), // (0x7f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[1]", ty: UInt<8> },
-                },
-                22: Copy {
-                    dest: StatePartIndex<BigSlots>(18), // (0x3f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[2]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(39), // (0x3f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[2]", ty: UInt<8> },
-                },
-                23: Copy {
-                    dest: StatePartIndex<BigSlots>(19), // (0x1f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[3]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(40), // (0x1f) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[3]", ty: UInt<8> },
-                },
-                24: Copy {
-                    dest: StatePartIndex<BigSlots>(20), // (0xf) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[4]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(41), // (0xf) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[4]", ty: UInt<8> },
-                },
-                25: Copy {
-                    dest: StatePartIndex<BigSlots>(21), // (0x7) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[5]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(42), // (0x7) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[5]", ty: UInt<8> },
-                },
-                26: Copy {
-                    dest: StatePartIndex<BigSlots>(22), // (0x3) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[6]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(43), // (0x3) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[6]", ty: UInt<8> },
-                },
-                27: Copy {
-                    dest: StatePartIndex<BigSlots>(23), // (0x1) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[7]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(44), // (0x1) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[7]", ty: UInt<8> },
-                },
-                28: Copy {
-                    dest: StatePartIndex<BigSlots>(24), // (0x0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[8]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(45), // (0x0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[8]", ty: UInt<8> },
-                },
-                29: Copy {
-                    dest: StatePartIndex<BigSlots>(25), // (0x80) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[9]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(46), // (0x80) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[9]", ty: UInt<8> },
-                },
-                30: Copy {
-                    dest: StatePartIndex<BigSlots>(26), // (0xc0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[10]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(47), // (0xc0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[10]", ty: UInt<8> },
-                },
-                31: Copy {
-                    dest: StatePartIndex<BigSlots>(27), // (0xe0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[11]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(48), // (0xe0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[11]", ty: UInt<8> },
-                },
-                32: Copy {
-                    dest: StatePartIndex<BigSlots>(28), // (0xf0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[12]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(49), // (0xf0) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[12]", ty: UInt<8> },
-                },
-                33: Copy {
-                    dest: StatePartIndex<BigSlots>(29), // (0xf8) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[13]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(50), // (0xf8) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[13]", ty: UInt<8> },
-                },
-                34: Copy {
-                    dest: StatePartIndex<BigSlots>(30), // (0xfc) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[14]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(51), // (0xfc) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[14]", ty: UInt<8> },
-                },
-                35: Copy {
-                    dest: StatePartIndex<BigSlots>(31), // (0xfe) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_out[15]", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(52), // (0xfe) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[15]", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:14:1
-                36: ReadIndexed {
-                    dest: StatePartIndex<BigSlots>(53), // (0xff) SlotDebugData { name: "", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(37) /* (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::array_wire[0]", ty: UInt<8> } */ [StatePartIndex<SmallSlots>(1) /* (0x0 0) SlotDebugData { name: "", ty: UInt<8> } */ , len=16, stride=1],,
-                },
-                37: Copy {
-                    dest: StatePartIndex<BigSlots>(33), // (0xff) SlotDebugData { name: "InstantiatedModule(array_rw: array_rw).array_rw::read_data", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(53), // (0xff) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                38: Return,
-            ],
-            ..
-        },
-        pc: 38,
-        memory_write_log: [],
-        memories: StatePart {
-            value: [],
-        },
-        small_slots: StatePart {
-            value: [
-                16,
-                0,
-            ],
-        },
-        big_slots: StatePart {
-            value: [
-                255,
-                127,
-                63,
-                31,
-                15,
-                7,
-                3,
-                1,
-                0,
-                128,
-                192,
-                224,
-                240,
-                248,
-                252,
-                254,
-                255,
-                127,
-                63,
-                31,
-                15,
-                7,
-                3,
-                1,
-                0,
-                128,
-                192,
-                224,
-                240,
-                248,
-                252,
-                254,
-                0,
-                255,
-                16,
-                0,
-                1,
-                255,
-                127,
-                63,
-                31,
-                15,
-                7,
-                3,
-                1,
-                0,
-                128,
-                192,
-                224,
-                240,
-                248,
-                252,
-                254,
-                255,
-            ],
-        },
-    },
-    io: Instance {
-        name: <simulator>::array_rw,
-        instantiated: Module {
-            name: array_rw,
-            ..
-        },
-    },
-    uninitialized_inputs: {},
-    io_targets: {
-        Instance {
-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
-            },
-        }.array_in: CompiledValue {
-            layout: CompiledTypeLayout {
-                ty: Array<UInt<8>, 16>,
-                layout: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
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-        },
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-                name: array_rw,
-                ..
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-            write: None,
-        },
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-            instantiated: Module {
-                name: array_rw,
-                ..
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-        },
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-            instantiated: Module {
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-            layout: CompiledTypeLayout {
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-            write: None,
-        },
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-                name: array_rw,
-                ..
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-            layout: CompiledTypeLayout {
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-        },
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-            instantiated: Module {
-                name: array_rw,
-                ..
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-        },
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-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
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-        }.array_out[7]: CompiledValue {
-            layout: CompiledTypeLayout {
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-                        debug_data: [],
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-                        debug_data: [
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-                        ..
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-            },
-            write: None,
-        },
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-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
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-        }.array_out[8]: CompiledValue {
-            layout: CompiledTypeLayout {
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-                        debug_data: [
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-            write: None,
-        },
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-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
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-        }.array_out[9]: CompiledValue {
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-                        debug_data: [
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-                big_slots: StatePartIndexRange<BigSlots> { start: 25, len: 1 },
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-            write: None,
-        },
-        Instance {
-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
-            },
-        }.read_data: CompiledValue {
-            layout: CompiledTypeLayout {
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-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 0,
-                        debug_data: [],
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-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 1,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::read_data",
-                                ty: UInt<8>,
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-                        ],
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-            range: TypeIndexRange {
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-        },
-        Instance {
-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
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-        }.read_index: CompiledValue {
-            layout: CompiledTypeLayout {
-                ty: UInt<8>,
-                layout: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 0,
-                        debug_data: [],
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-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 1,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::read_index",
-                                ty: UInt<8>,
-                            },
-                        ],
-                        ..
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-                },
-                body: Scalar,
-            },
-            range: TypeIndexRange {
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-                big_slots: StatePartIndexRange<BigSlots> { start: 32, len: 1 },
-            },
-            write: None,
-        },
-        Instance {
-            name: <simulator>::array_rw,
-            instantiated: Module {
-                name: array_rw,
-                ..
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-        }.write_data: CompiledValue {
-            layout: CompiledTypeLayout {
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-                        debug_data: [],
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-                        len: 1,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::write_data",
-                                ty: UInt<8>,
-                            },
-                        ],
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-                    },
-                },
-                body: Scalar,
-            },
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-                big_slots: StatePartIndexRange<BigSlots> { start: 35, len: 1 },
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-            write: None,
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-            instantiated: Module {
-                name: array_rw,
-                ..
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-        }.write_en: CompiledValue {
-            layout: CompiledTypeLayout {
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-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::write_en",
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-            range: TypeIndexRange {
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-                big_slots: StatePartIndexRange<BigSlots> { start: 36, len: 1 },
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-                name: array_rw,
-                ..
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-        }.write_index: CompiledValue {
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-                        debug_data: [],
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-                        debug_data: [
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-                                name: "InstantiatedModule(array_rw: array_rw).array_rw::write_index",
-                                ty: UInt<8>,
-                            },
-                        ],
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-                },
-                body: Scalar,
-            },
-            range: TypeIndexRange {
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-    },
-    made_initial_step: true,
-    needs_settle: false,
-    trace_decls: TraceModule {
-        name: "array_rw",
-        children: [
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-                child: TraceArray {
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-                    elements: [
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-                            ty: UInt<8>,
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-                        },
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-                            location: TraceScalarId(2),
-                            name: "[2]",
-                            ty: UInt<8>,
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-                        },
-                        TraceUInt {
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-                            name: "[3]",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
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-                            location: TraceScalarId(4),
-                            name: "[4]",
-                            ty: UInt<8>,
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-                        },
-                        TraceUInt {
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-                            name: "[5]",
-                            ty: UInt<8>,
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-                        TraceUInt {
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-                            name: "[6]",
-                            ty: UInt<8>,
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-                        TraceUInt {
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-                            name: "[7]",
-                            ty: UInt<8>,
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-                        TraceUInt {
-                            location: TraceScalarId(8),
-                            name: "[8]",
-                            ty: UInt<8>,
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-                        },
-                        TraceUInt {
-                            location: TraceScalarId(9),
-                            name: "[9]",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(10),
-                            name: "[10]",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(11),
-                            name: "[11]",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(12),
-                            name: "[12]",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(13),
-                            name: "[13]",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(14),
-                            name: "[14]",
-                            ty: UInt<8>,
-                            flow: Source,
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-                        TraceUInt {
-                            location: TraceScalarId(15),
-                            name: "[15]",
-                            ty: UInt<8>,
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-                        },
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-                    ty: Array<UInt<8>, 16>,
-                    flow: Source,
-                },
-                ty: Array<UInt<8>, 16>,
-                flow: Source,
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-            TraceModuleIO {
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-                child: TraceArray {
-                    name: "array_out",
-                    elements: [
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-                            name: "[0]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(17),
-                            name: "[1]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(18),
-                            name: "[2]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(19),
-                            name: "[3]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(20),
-                            name: "[4]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(21),
-                            name: "[5]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(22),
-                            name: "[6]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(23),
-                            name: "[7]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(24),
-                            name: "[8]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(25),
-                            name: "[9]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(26),
-                            name: "[10]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(27),
-                            name: "[11]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(28),
-                            name: "[12]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(29),
-                            name: "[13]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(30),
-                            name: "[14]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(31),
-                            name: "[15]",
-                            ty: UInt<8>,
-                            flow: Sink,
-                        },
-                    ],
-                    ty: Array<UInt<8>, 16>,
-                    flow: Sink,
-                },
-                ty: Array<UInt<8>, 16>,
-                flow: Sink,
-            },
-            TraceModuleIO {
-                name: "read_index",
-                child: TraceUInt {
-                    location: TraceScalarId(32),
-                    name: "read_index",
-                    ty: UInt<8>,
-                    flow: Source,
-                },
-                ty: UInt<8>,
-                flow: Source,
-            },
-            TraceModuleIO {
-                name: "read_data",
-                child: TraceUInt {
-                    location: TraceScalarId(33),
-                    name: "read_data",
-                    ty: UInt<8>,
-                    flow: Sink,
-                },
-                ty: UInt<8>,
-                flow: Sink,
-            },
-            TraceModuleIO {
-                name: "write_index",
-                child: TraceUInt {
-                    location: TraceScalarId(34),
-                    name: "write_index",
-                    ty: UInt<8>,
-                    flow: Source,
-                },
-                ty: UInt<8>,
-                flow: Source,
-            },
-            TraceModuleIO {
-                name: "write_data",
-                child: TraceUInt {
-                    location: TraceScalarId(35),
-                    name: "write_data",
-                    ty: UInt<8>,
-                    flow: Source,
-                },
-                ty: UInt<8>,
-                flow: Source,
-            },
-            TraceModuleIO {
-                name: "write_en",
-                child: TraceBool {
-                    location: TraceScalarId(36),
-                    name: "write_en",
-                    flow: Source,
-                },
-                ty: Bool,
-                flow: Source,
-            },
-            TraceWire {
-                name: "array_wire",
-                child: TraceArray {
-                    name: "array_wire",
-                    elements: [
-                        TraceUInt {
-                            location: TraceScalarId(37),
-                            name: "[0]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(38),
-                            name: "[1]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(39),
-                            name: "[2]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(40),
-                            name: "[3]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(41),
-                            name: "[4]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(42),
-                            name: "[5]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(43),
-                            name: "[6]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(44),
-                            name: "[7]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(45),
-                            name: "[8]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(46),
-                            name: "[9]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(47),
-                            name: "[10]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(48),
-                            name: "[11]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(49),
-                            name: "[12]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(50),
-                            name: "[13]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(51),
-                            name: "[14]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                        TraceUInt {
-                            location: TraceScalarId(52),
-                            name: "[15]",
-                            ty: UInt<8>,
-                            flow: Duplex,
-                        },
-                    ],
-                    ty: Array<UInt<8>, 16>,
-                    flow: Duplex,
-                },
-                ty: Array<UInt<8>, 16>,
-            },
-        ],
-    },
-    traces: [
-        SimTrace {
-            id: TraceScalarId(0),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(0),
-                ty: UInt<8>,
-            },
-            state: 0xff,
-            last_state: 0xff,
-        },
-        SimTrace {
-            id: TraceScalarId(1),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(1),
-                ty: UInt<8>,
-            },
-            state: 0x7f,
-            last_state: 0x7f,
-        },
-        SimTrace {
-            id: TraceScalarId(2),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(2),
-                ty: UInt<8>,
-            },
-            state: 0x3f,
-            last_state: 0x3f,
-        },
-        SimTrace {
-            id: TraceScalarId(3),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(3),
-                ty: UInt<8>,
-            },
-            state: 0x1f,
-            last_state: 0x1f,
-        },
-        SimTrace {
-            id: TraceScalarId(4),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(4),
-                ty: UInt<8>,
-            },
-            state: 0x0f,
-            last_state: 0x0f,
-        },
-        SimTrace {
-            id: TraceScalarId(5),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(5),
-                ty: UInt<8>,
-            },
-            state: 0x07,
-            last_state: 0x07,
-        },
-        SimTrace {
-            id: TraceScalarId(6),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(6),
-                ty: UInt<8>,
-            },
-            state: 0x03,
-            last_state: 0x03,
-        },
-        SimTrace {
-            id: TraceScalarId(7),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(7),
-                ty: UInt<8>,
-            },
-            state: 0x01,
-            last_state: 0x01,
-        },
-        SimTrace {
-            id: TraceScalarId(8),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(8),
-                ty: UInt<8>,
-            },
-            state: 0x00,
-            last_state: 0x00,
-        },
-        SimTrace {
-            id: TraceScalarId(9),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(9),
-                ty: UInt<8>,
-            },
-            state: 0x80,
-            last_state: 0x80,
-        },
-        SimTrace {
-            id: TraceScalarId(10),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(10),
-                ty: UInt<8>,
-            },
-            state: 0xc0,
-            last_state: 0xc0,
-        },
-        SimTrace {
-            id: TraceScalarId(11),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(11),
-                ty: UInt<8>,
-            },
-            state: 0xe0,
-            last_state: 0xe0,
-        },
-        SimTrace {
-            id: TraceScalarId(12),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(12),
-                ty: UInt<8>,
-            },
-            state: 0xf0,
-            last_state: 0xf0,
-        },
-        SimTrace {
-            id: TraceScalarId(13),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(13),
-                ty: UInt<8>,
-            },
-            state: 0xf8,
-            last_state: 0xf8,
-        },
-        SimTrace {
-            id: TraceScalarId(14),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(14),
-                ty: UInt<8>,
-            },
-            state: 0xfc,
-            last_state: 0xfc,
-        },
-        SimTrace {
-            id: TraceScalarId(15),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(15),
-                ty: UInt<8>,
-            },
-            state: 0xfe,
-            last_state: 0xfe,
-        },
-        SimTrace {
-            id: TraceScalarId(16),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(16),
-                ty: UInt<8>,
-            },
-            state: 0xff,
-            last_state: 0xff,
-        },
-        SimTrace {
-            id: TraceScalarId(17),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(17),
-                ty: UInt<8>,
-            },
-            state: 0x7f,
-            last_state: 0x7f,
-        },
-        SimTrace {
-            id: TraceScalarId(18),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(18),
-                ty: UInt<8>,
-            },
-            state: 0x3f,
-            last_state: 0x3f,
-        },
-        SimTrace {
-            id: TraceScalarId(19),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(19),
-                ty: UInt<8>,
-            },
-            state: 0x1f,
-            last_state: 0x1f,
-        },
-        SimTrace {
-            id: TraceScalarId(20),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(20),
-                ty: UInt<8>,
-            },
-            state: 0x0f,
-            last_state: 0x0f,
-        },
-        SimTrace {
-            id: TraceScalarId(21),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(21),
-                ty: UInt<8>,
-            },
-            state: 0x07,
-            last_state: 0x07,
-        },
-        SimTrace {
-            id: TraceScalarId(22),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(22),
-                ty: UInt<8>,
-            },
-            state: 0x03,
-            last_state: 0x03,
-        },
-        SimTrace {
-            id: TraceScalarId(23),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(23),
-                ty: UInt<8>,
-            },
-            state: 0x01,
-            last_state: 0x01,
-        },
-        SimTrace {
-            id: TraceScalarId(24),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(24),
-                ty: UInt<8>,
-            },
-            state: 0x00,
-            last_state: 0x00,
-        },
-        SimTrace {
-            id: TraceScalarId(25),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(25),
-                ty: UInt<8>,
-            },
-            state: 0x80,
-            last_state: 0x80,
-        },
-        SimTrace {
-            id: TraceScalarId(26),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(26),
-                ty: UInt<8>,
-            },
-            state: 0xc0,
-            last_state: 0xc0,
-        },
-        SimTrace {
-            id: TraceScalarId(27),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(27),
-                ty: UInt<8>,
-            },
-            state: 0xe0,
-            last_state: 0xe0,
-        },
-        SimTrace {
-            id: TraceScalarId(28),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(28),
-                ty: UInt<8>,
-            },
-            state: 0xf0,
-            last_state: 0xf0,
-        },
-        SimTrace {
-            id: TraceScalarId(29),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(29),
-                ty: UInt<8>,
-            },
-            state: 0xf8,
-            last_state: 0xf8,
-        },
-        SimTrace {
-            id: TraceScalarId(30),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(30),
-                ty: UInt<8>,
-            },
-            state: 0xfc,
-            last_state: 0xfc,
-        },
-        SimTrace {
-            id: TraceScalarId(31),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(31),
-                ty: UInt<8>,
-            },
-            state: 0xfe,
-            last_state: 0xe1,
-        },
-        SimTrace {
-            id: TraceScalarId(32),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(32),
-                ty: UInt<8>,
-            },
-            state: 0x00,
-            last_state: 0x00,
-        },
-        SimTrace {
-            id: TraceScalarId(33),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(33),
-                ty: UInt<8>,
-            },
-            state: 0xff,
-            last_state: 0xff,
-        },
-        SimTrace {
-            id: TraceScalarId(34),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(34),
-                ty: UInt<8>,
-            },
-            state: 0x10,
-            last_state: 0x0f,
-        },
-        SimTrace {
-            id: TraceScalarId(35),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(35),
-                ty: UInt<8>,
-            },
-            state: 0x00,
-            last_state: 0xe1,
-        },
-        SimTrace {
-            id: TraceScalarId(36),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(36),
-            },
-            state: 0x1,
-            last_state: 0x1,
-        },
-        SimTrace {
-            id: TraceScalarId(37),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(37),
-                ty: UInt<8>,
-            },
-            state: 0xff,
-            last_state: 0xff,
-        },
-        SimTrace {
-            id: TraceScalarId(38),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(38),
-                ty: UInt<8>,
-            },
-            state: 0x7f,
-            last_state: 0x7f,
-        },
-        SimTrace {
-            id: TraceScalarId(39),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(39),
-                ty: UInt<8>,
-            },
-            state: 0x3f,
-            last_state: 0x3f,
-        },
-        SimTrace {
-            id: TraceScalarId(40),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(40),
-                ty: UInt<8>,
-            },
-            state: 0x1f,
-            last_state: 0x1f,
-        },
-        SimTrace {
-            id: TraceScalarId(41),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(41),
-                ty: UInt<8>,
-            },
-            state: 0x0f,
-            last_state: 0x0f,
-        },
-        SimTrace {
-            id: TraceScalarId(42),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(42),
-                ty: UInt<8>,
-            },
-            state: 0x07,
-            last_state: 0x07,
-        },
-        SimTrace {
-            id: TraceScalarId(43),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(43),
-                ty: UInt<8>,
-            },
-            state: 0x03,
-            last_state: 0x03,
-        },
-        SimTrace {
-            id: TraceScalarId(44),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(44),
-                ty: UInt<8>,
-            },
-            state: 0x01,
-            last_state: 0x01,
-        },
-        SimTrace {
-            id: TraceScalarId(45),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(45),
-                ty: UInt<8>,
-            },
-            state: 0x00,
-            last_state: 0x00,
-        },
-        SimTrace {
-            id: TraceScalarId(46),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(46),
-                ty: UInt<8>,
-            },
-            state: 0x80,
-            last_state: 0x80,
-        },
-        SimTrace {
-            id: TraceScalarId(47),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(47),
-                ty: UInt<8>,
-            },
-            state: 0xc0,
-            last_state: 0xc0,
-        },
-        SimTrace {
-            id: TraceScalarId(48),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(48),
-                ty: UInt<8>,
-            },
-            state: 0xe0,
-            last_state: 0xe0,
-        },
-        SimTrace {
-            id: TraceScalarId(49),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(49),
-                ty: UInt<8>,
-            },
-            state: 0xf0,
-            last_state: 0xf0,
-        },
-        SimTrace {
-            id: TraceScalarId(50),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(50),
-                ty: UInt<8>,
-            },
-            state: 0xf8,
-            last_state: 0xf8,
-        },
-        SimTrace {
-            id: TraceScalarId(51),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(51),
-                ty: UInt<8>,
-            },
-            state: 0xfc,
-            last_state: 0xfc,
-        },
-        SimTrace {
-            id: TraceScalarId(52),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(52),
-                ty: UInt<8>,
-            },
-            state: 0xfe,
-            last_state: 0xe1,
-        },
-    ],
-    trace_memories: {},
-    trace_writers: [
-        Running(
-            VcdWriter {
-                finished_init: true,
-                timescale: 1 ps,
-                ..
-            },
-        ),
-    ],
-    instant: 34 μs,
-    clocks_triggered: [],
-    ..
-}
\ No newline at end of file
diff --git a/crates/fayalite/tests/sim/expected/array_rw.vcd b/crates/fayalite/tests/sim/expected/array_rw.vcd
deleted file mode 100644
index 8ede394..0000000
--- a/crates/fayalite/tests/sim/expected/array_rw.vcd
+++ /dev/null
@@ -1,283 +0,0 @@
-$timescale 1 ps $end
-$scope module array_rw $end
-$scope struct array_in $end
-$var wire 8 ! \[0] $end
-$var wire 8 " \[1] $end
-$var wire 8 # \[2] $end
-$var wire 8 $ \[3] $end
-$var wire 8 % \[4] $end
-$var wire 8 & \[5] $end
-$var wire 8 ' \[6] $end
-$var wire 8 ( \[7] $end
-$var wire 8 ) \[8] $end
-$var wire 8 * \[9] $end
-$var wire 8 + \[10] $end
-$var wire 8 , \[11] $end
-$var wire 8 - \[12] $end
-$var wire 8 . \[13] $end
-$var wire 8 / \[14] $end
-$var wire 8 0 \[15] $end
-$upscope $end
-$scope struct array_out $end
-$var wire 8 1 \[0] $end
-$var wire 8 2 \[1] $end
-$var wire 8 3 \[2] $end
-$var wire 8 4 \[3] $end
-$var wire 8 5 \[4] $end
-$var wire 8 6 \[5] $end
-$var wire 8 7 \[6] $end
-$var wire 8 8 \[7] $end
-$var wire 8 9 \[8] $end
-$var wire 8 : \[9] $end
-$var wire 8 ; \[10] $end
-$var wire 8 < \[11] $end
-$var wire 8 = \[12] $end
-$var wire 8 > \[13] $end
-$var wire 8 ? \[14] $end
-$var wire 8 @ \[15] $end
-$upscope $end
-$var wire 8 A read_index $end
-$var wire 8 B read_data $end
-$var wire 8 C write_index $end
-$var wire 8 D write_data $end
-$var wire 1 E write_en $end
-$scope struct array_wire $end
-$var wire 8 F \[0] $end
-$var wire 8 G \[1] $end
-$var wire 8 H \[2] $end
-$var wire 8 I \[3] $end
-$var wire 8 J \[4] $end
-$var wire 8 K \[5] $end
-$var wire 8 L \[6] $end
-$var wire 8 M \[7] $end
-$var wire 8 N \[8] $end
-$var wire 8 O \[9] $end
-$var wire 8 P \[10] $end
-$var wire 8 Q \[11] $end
-$var wire 8 R \[12] $end
-$var wire 8 S \[13] $end
-$var wire 8 T \[14] $end
-$var wire 8 U \[15] $end
-$upscope $end
-$upscope $end
-$enddefinitions $end
-$dumpvars
-b11111111 !
-b1111111 "
-b111111 #
-b11111 $
-b1111 %
-b111 &
-b11 '
-b1 (
-b0 )
-b10000000 *
-b11000000 +
-b11100000 ,
-b11110000 -
-b11111000 .
-b11111100 /
-b11111110 0
-b11111111 1
-b1111111 2
-b111111 3
-b11111 4
-b1111 5
-b111 6
-b11 7
-b1 8
-b0 9
-b10000000 :
-b11000000 ;
-b11100000 <
-b11110000 =
-b11111000 >
-b11111100 ?
-b11111110 @
-b0 A
-b11111111 B
-b0 C
-b0 D
-0E
-b11111111 F
-b1111111 G
-b111111 H
-b11111 I
-b1111 J
-b111 K
-b11 L
-b1 M
-b0 N
-b10000000 O
-b11000000 P
-b11100000 Q
-b11110000 R
-b11111000 S
-b11111100 T
-b11111110 U
-$end
-#1000000
-b1 A
-b1111111 B
-#2000000
-b10 A
-b111111 B
-#3000000
-b11 A
-b11111 B
-#4000000
-b100 A
-b1111 B
-#5000000
-b101 A
-b111 B
-#6000000
-b110 A
-b11 B
-#7000000
-b111 A
-b1 B
-#8000000
-b1000 A
-b0 B
-#9000000
-b1001 A
-b10000000 B
-#10000000
-b1010 A
-b11000000 B
-#11000000
-b1011 A
-b11100000 B
-#12000000
-b1100 A
-b11110000 B
-#13000000
-b1101 A
-b11111000 B
-#14000000
-b1110 A
-b11111100 B
-#15000000
-b1111 A
-b11111110 B
-#16000000
-b10000 A
-b0 B
-#17000000
-b0 1
-b0 A
-1E
-b0 F
-#18000000
-b11111111 1
-b1 2
-b11111111 B
-b1 C
-b1 D
-b11111111 F
-b1 G
-#19000000
-b1111111 2
-b100 3
-b10 C
-b100 D
-b1111111 G
-b100 H
-#20000000
-b111111 3
-b1001 4
-b11 C
-b1001 D
-b111111 H
-b1001 I
-#21000000
-b11111 4
-b10000 5
-b100 C
-b10000 D
-b11111 I
-b10000 J
-#22000000
-b1111 5
-b11001 6
-b101 C
-b11001 D
-b1111 J
-b11001 K
-#23000000
-b111 6
-b100100 7
-b110 C
-b100100 D
-b111 K
-b100100 L
-#24000000
-b11 7
-b110001 8
-b111 C
-b110001 D
-b11 L
-b110001 M
-#25000000
-b1 8
-b1000000 9
-b1000 C
-b1000000 D
-b1 M
-b1000000 N
-#26000000
-b0 9
-b1010001 :
-b1001 C
-b1010001 D
-b0 N
-b1010001 O
-#27000000
-b10000000 :
-b1100100 ;
-b1010 C
-b1100100 D
-b10000000 O
-b1100100 P
-#28000000
-b11000000 ;
-b1111001 <
-b1011 C
-b1111001 D
-b11000000 P
-b1111001 Q
-#29000000
-b11100000 <
-b10010000 =
-b1100 C
-b10010000 D
-b11100000 Q
-b10010000 R
-#30000000
-b11110000 =
-b10101001 >
-b1101 C
-b10101001 D
-b11110000 R
-b10101001 S
-#31000000
-b11111000 >
-b11000100 ?
-b1110 C
-b11000100 D
-b11111000 S
-b11000100 T
-#32000000
-b11111100 ?
-b11100001 @
-b1111 C
-b11100001 D
-b11111100 T
-b11100001 U
-#33000000
-b11111110 @
-b10000 C
-b0 D
-b11111110 U
-#34000000
diff --git a/crates/fayalite/tests/sim/expected/conditional_assignment_last.txt b/crates/fayalite/tests/sim/expected/conditional_assignment_last.txt
deleted file mode 100644
index 186e5a5..0000000
--- a/crates/fayalite/tests/sim/expected/conditional_assignment_last.txt
+++ /dev/null
@@ -1,189 +0,0 @@
-Simulation {
-    state: State {
-        insns: Insns {
-            state_layout: StateLayout {
-                ty: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 0,
-                        debug_data: [],
-                        ..
-                    },
-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 4,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(conditional_assignment_last: conditional_assignment_last).conditional_assignment_last::i",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(conditional_assignment_last: conditional_assignment_last).conditional_assignment_last::w",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Bool,
-                            },
-                        ],
-                        ..
-                    },
-                },
-                memories: StatePartLayout<Memories> {
-                    len: 0,
-                    debug_data: [],
-                    layout_data: [],
-                    ..
-                },
-            },
-            insns: [
-                // at: module-XXXXXXXXXX.rs:1:1
-                0: Const {
-                    dest: StatePartIndex<BigSlots>(3), // (0x0) SlotDebugData { name: "", ty: Bool },
-                    value: 0x0,
-                },
-                1: Const {
-                    dest: StatePartIndex<BigSlots>(2), // (0x1) SlotDebugData { name: "", ty: Bool },
-                    value: 0x1,
-                },
-                // at: module-XXXXXXXXXX.rs:4:1
-                2: Copy {
-                    dest: StatePartIndex<BigSlots>(1), // (0x0) SlotDebugData { name: "InstantiatedModule(conditional_assignment_last: conditional_assignment_last).conditional_assignment_last::w", ty: Bool },
-                    src: StatePartIndex<BigSlots>(2), // (0x1) SlotDebugData { name: "", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:5:1
-                3: BranchIfZero {
-                    target: 5,
-                    value: StatePartIndex<BigSlots>(0), // (0x1) SlotDebugData { name: "InstantiatedModule(conditional_assignment_last: conditional_assignment_last).conditional_assignment_last::i", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:6:1
-                4: Copy {
-                    dest: StatePartIndex<BigSlots>(1), // (0x0) SlotDebugData { name: "InstantiatedModule(conditional_assignment_last: conditional_assignment_last).conditional_assignment_last::w", ty: Bool },
-                    src: StatePartIndex<BigSlots>(3), // (0x0) SlotDebugData { name: "", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                5: Return,
-            ],
-            ..
-        },
-        pc: 5,
-        memory_write_log: [],
-        memories: StatePart {
-            value: [],
-        },
-        small_slots: StatePart {
-            value: [],
-        },
-        big_slots: StatePart {
-            value: [
-                1,
-                0,
-                1,
-                0,
-            ],
-        },
-    },
-    io: Instance {
-        name: <simulator>::conditional_assignment_last,
-        instantiated: Module {
-            name: conditional_assignment_last,
-            ..
-        },
-    },
-    uninitialized_inputs: {},
-    io_targets: {
-        Instance {
-            name: <simulator>::conditional_assignment_last,
-            instantiated: Module {
-                name: conditional_assignment_last,
-                ..
-            },
-        }.i: CompiledValue {
-            layout: CompiledTypeLayout {
-                ty: Bool,
-                layout: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 0,
-                        debug_data: [],
-                        ..
-                    },
-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 1,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(conditional_assignment_last: conditional_assignment_last).conditional_assignment_last::i",
-                                ty: Bool,
-                            },
-                        ],
-                        ..
-                    },
-                },
-                body: Scalar,
-            },
-            range: TypeIndexRange {
-                small_slots: StatePartIndexRange<SmallSlots> { start: 0, len: 0 },
-                big_slots: StatePartIndexRange<BigSlots> { start: 0, len: 1 },
-            },
-            write: None,
-        },
-    },
-    made_initial_step: true,
-    needs_settle: false,
-    trace_decls: TraceModule {
-        name: "conditional_assignment_last",
-        children: [
-            TraceModuleIO {
-                name: "i",
-                child: TraceBool {
-                    location: TraceScalarId(0),
-                    name: "i",
-                    flow: Source,
-                },
-                ty: Bool,
-                flow: Source,
-            },
-            TraceWire {
-                name: "w",
-                child: TraceBool {
-                    location: TraceScalarId(1),
-                    name: "w",
-                    flow: Duplex,
-                },
-                ty: Bool,
-            },
-        ],
-    },
-    traces: [
-        SimTrace {
-            id: TraceScalarId(0),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(0),
-            },
-            state: 0x1,
-            last_state: 0x0,
-        },
-        SimTrace {
-            id: TraceScalarId(1),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(1),
-            },
-            state: 0x0,
-            last_state: 0x1,
-        },
-    ],
-    trace_memories: {},
-    trace_writers: [
-        Running(
-            VcdWriter {
-                finished_init: true,
-                timescale: 1 ps,
-                ..
-            },
-        ),
-    ],
-    instant: 2 μs,
-    clocks_triggered: [],
-    ..
-}
\ No newline at end of file
diff --git a/crates/fayalite/tests/sim/expected/conditional_assignment_last.vcd b/crates/fayalite/tests/sim/expected/conditional_assignment_last.vcd
deleted file mode 100644
index dd9a85a..0000000
--- a/crates/fayalite/tests/sim/expected/conditional_assignment_last.vcd
+++ /dev/null
@@ -1,14 +0,0 @@
-$timescale 1 ps $end
-$scope module conditional_assignment_last $end
-$var wire 1 ! i $end
-$var wire 1 " w $end
-$upscope $end
-$enddefinitions $end
-$dumpvars
-0!
-1"
-$end
-#1000000
-1!
-0"
-#2000000
diff --git a/crates/fayalite/tests/sim/expected/duplicate_names.txt b/crates/fayalite/tests/sim/expected/duplicate_names.txt
deleted file mode 100644
index 8a59861..0000000
--- a/crates/fayalite/tests/sim/expected/duplicate_names.txt
+++ /dev/null
@@ -1,153 +0,0 @@
-Simulation {
-    state: State {
-        insns: Insns {
-            state_layout: StateLayout {
-                ty: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 0,
-                        debug_data: [],
-                        ..
-                    },
-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 4,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(duplicate_names: duplicate_names).duplicate_names::w",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(duplicate_names: duplicate_names).duplicate_names::w",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                        ],
-                        ..
-                    },
-                },
-                memories: StatePartLayout<Memories> {
-                    len: 0,
-                    debug_data: [],
-                    layout_data: [],
-                    ..
-                },
-            },
-            insns: [
-                // at: module-XXXXXXXXXX.rs:1:1
-                0: Const {
-                    dest: StatePartIndex<BigSlots>(3), // (0x6) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x6,
-                },
-                // at: module-XXXXXXXXXX.rs:5:1
-                1: Copy {
-                    dest: StatePartIndex<BigSlots>(2), // (0x6) SlotDebugData { name: "InstantiatedModule(duplicate_names: duplicate_names).duplicate_names::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(3), // (0x6) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                2: Const {
-                    dest: StatePartIndex<BigSlots>(1), // (0x5) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x5,
-                },
-                // at: module-XXXXXXXXXX.rs:3:1
-                3: Copy {
-                    dest: StatePartIndex<BigSlots>(0), // (0x5) SlotDebugData { name: "InstantiatedModule(duplicate_names: duplicate_names).duplicate_names::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(1), // (0x5) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                4: Return,
-            ],
-            ..
-        },
-        pc: 4,
-        memory_write_log: [],
-        memories: StatePart {
-            value: [],
-        },
-        small_slots: StatePart {
-            value: [],
-        },
-        big_slots: StatePart {
-            value: [
-                5,
-                5,
-                6,
-                6,
-            ],
-        },
-    },
-    io: Instance {
-        name: <simulator>::duplicate_names,
-        instantiated: Module {
-            name: duplicate_names,
-            ..
-        },
-    },
-    uninitialized_inputs: {},
-    io_targets: {},
-    made_initial_step: true,
-    needs_settle: false,
-    trace_decls: TraceModule {
-        name: "duplicate_names",
-        children: [
-            TraceWire {
-                name: "w",
-                child: TraceUInt {
-                    location: TraceScalarId(0),
-                    name: "w",
-                    ty: UInt<8>,
-                    flow: Duplex,
-                },
-                ty: UInt<8>,
-            },
-            TraceWire {
-                name: "w",
-                child: TraceUInt {
-                    location: TraceScalarId(1),
-                    name: "w",
-                    ty: UInt<8>,
-                    flow: Duplex,
-                },
-                ty: UInt<8>,
-            },
-        ],
-    },
-    traces: [
-        SimTrace {
-            id: TraceScalarId(0),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(0),
-                ty: UInt<8>,
-            },
-            state: 0x05,
-            last_state: 0x05,
-        },
-        SimTrace {
-            id: TraceScalarId(1),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(2),
-                ty: UInt<8>,
-            },
-            state: 0x06,
-            last_state: 0x06,
-        },
-    ],
-    trace_memories: {},
-    trace_writers: [
-        Running(
-            VcdWriter {
-                finished_init: true,
-                timescale: 1 ps,
-                ..
-            },
-        ),
-    ],
-    instant: 1 μs,
-    clocks_triggered: [],
-    ..
-}
\ No newline at end of file
diff --git a/crates/fayalite/tests/sim/expected/duplicate_names.vcd b/crates/fayalite/tests/sim/expected/duplicate_names.vcd
deleted file mode 100644
index 1e9f6c6..0000000
--- a/crates/fayalite/tests/sim/expected/duplicate_names.vcd
+++ /dev/null
@@ -1,11 +0,0 @@
-$timescale 1 ps $end
-$scope module duplicate_names $end
-$var wire 8 ! w $end
-$var wire 8 " w_2 $end
-$upscope $end
-$enddefinitions $end
-$dumpvars
-b101 !
-b110 "
-$end
-#1000000
diff --git a/crates/fayalite/tests/sim/expected/memories.vcd b/crates/fayalite/tests/sim/expected/memories.vcd
index bedc354..72af410 100644
--- a/crates/fayalite/tests/sim/expected/memories.vcd
+++ b/crates/fayalite/tests/sim/expected/memories.vcd
@@ -24,97 +24,97 @@ $upscope $end
 $upscope $end
 $scope struct mem $end
 $scope struct contents $end
-$scope struct \[0] $end
+$scope struct [0] $end
 $scope struct mem $end
 $var reg 8 9 \0 $end
 $var reg 8 I \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[1] $end
+$scope struct [1] $end
 $scope struct mem $end
 $var reg 8 : \0 $end
 $var reg 8 J \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[2] $end
+$scope struct [2] $end
 $scope struct mem $end
 $var reg 8 ; \0 $end
 $var reg 8 K \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[3] $end
+$scope struct [3] $end
 $scope struct mem $end
 $var reg 8 < \0 $end
 $var reg 8 L \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[4] $end
+$scope struct [4] $end
 $scope struct mem $end
 $var reg 8 = \0 $end
 $var reg 8 M \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[5] $end
+$scope struct [5] $end
 $scope struct mem $end
 $var reg 8 > \0 $end
 $var reg 8 N \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[6] $end
+$scope struct [6] $end
 $scope struct mem $end
 $var reg 8 ? \0 $end
 $var reg 8 O \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[7] $end
+$scope struct [7] $end
 $scope struct mem $end
 $var reg 8 @ \0 $end
 $var reg 8 P \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[8] $end
+$scope struct [8] $end
 $scope struct mem $end
 $var reg 8 A \0 $end
 $var reg 8 Q \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[9] $end
+$scope struct [9] $end
 $scope struct mem $end
 $var reg 8 B \0 $end
 $var reg 8 R \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[10] $end
+$scope struct [10] $end
 $scope struct mem $end
 $var reg 8 C \0 $end
 $var reg 8 S \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[11] $end
+$scope struct [11] $end
 $scope struct mem $end
 $var reg 8 D \0 $end
 $var reg 8 T \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[12] $end
+$scope struct [12] $end
 $scope struct mem $end
 $var reg 8 E \0 $end
 $var reg 8 U \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[13] $end
+$scope struct [13] $end
 $scope struct mem $end
 $var reg 8 F \0 $end
 $var reg 8 V \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[14] $end
+$scope struct [14] $end
 $scope struct mem $end
 $var reg 8 G \0 $end
 $var reg 8 W \1 $end
 $upscope $end
 $upscope $end
-$scope struct \[15] $end
+$scope struct [15] $end
 $scope struct mem $end
 $var reg 8 H \0 $end
 $var reg 8 X \1 $end
diff --git a/crates/fayalite/tests/sim/expected/memories2.vcd b/crates/fayalite/tests/sim/expected/memories2.vcd
index 4039754..bd48f24 100644
--- a/crates/fayalite/tests/sim/expected/memories2.vcd
+++ b/crates/fayalite/tests/sim/expected/memories2.vcd
@@ -11,31 +11,31 @@ $var wire 1 ' wmask $end
 $upscope $end
 $scope struct mem $end
 $scope struct contents $end
-$scope struct \[0] $end
+$scope struct [0] $end
 $scope struct mem $end
 $var string 1 1 \$tag $end
 $var reg 1 6 HdlSome $end
 $upscope $end
 $upscope $end
-$scope struct \[1] $end
+$scope struct [1] $end
 $scope struct mem $end
 $var string 1 2 \$tag $end
 $var reg 1 7 HdlSome $end
 $upscope $end
 $upscope $end
-$scope struct \[2] $end
+$scope struct [2] $end
 $scope struct mem $end
 $var string 1 3 \$tag $end
 $var reg 1 8 HdlSome $end
 $upscope $end
 $upscope $end
-$scope struct \[3] $end
+$scope struct [3] $end
 $scope struct mem $end
 $var string 1 4 \$tag $end
 $var reg 1 9 HdlSome $end
 $upscope $end
 $upscope $end
-$scope struct \[4] $end
+$scope struct [4] $end
 $scope struct mem $end
 $var string 1 5 \$tag $end
 $var reg 1 : HdlSome $end
diff --git a/crates/fayalite/tests/sim/expected/memories3.vcd b/crates/fayalite/tests/sim/expected/memories3.vcd
index 5768560..328fcaa 100644
--- a/crates/fayalite/tests/sim/expected/memories3.vcd
+++ b/crates/fayalite/tests/sim/expected/memories3.vcd
@@ -42,7 +42,7 @@ $upscope $end
 $upscope $end
 $scope struct mem $end
 $scope struct contents $end
-$scope struct \[0] $end
+$scope struct [0] $end
 $scope struct mem $end
 $var reg 8 ] \[0] $end
 $var reg 8 e \[1] $end
@@ -54,7 +54,7 @@ $var reg 8 /" \[6] $end
 $var reg 8 7" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[1] $end
+$scope struct [1] $end
 $scope struct mem $end
 $var reg 8 ^ \[0] $end
 $var reg 8 f \[1] $end
@@ -66,7 +66,7 @@ $var reg 8 0" \[6] $end
 $var reg 8 8" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[2] $end
+$scope struct [2] $end
 $scope struct mem $end
 $var reg 8 _ \[0] $end
 $var reg 8 g \[1] $end
@@ -78,7 +78,7 @@ $var reg 8 1" \[6] $end
 $var reg 8 9" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[3] $end
+$scope struct [3] $end
 $scope struct mem $end
 $var reg 8 ` \[0] $end
 $var reg 8 h \[1] $end
@@ -90,7 +90,7 @@ $var reg 8 2" \[6] $end
 $var reg 8 :" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[4] $end
+$scope struct [4] $end
 $scope struct mem $end
 $var reg 8 a \[0] $end
 $var reg 8 i \[1] $end
@@ -102,7 +102,7 @@ $var reg 8 3" \[6] $end
 $var reg 8 ;" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[5] $end
+$scope struct [5] $end
 $scope struct mem $end
 $var reg 8 b \[0] $end
 $var reg 8 j \[1] $end
@@ -114,7 +114,7 @@ $var reg 8 4" \[6] $end
 $var reg 8 <" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[6] $end
+$scope struct [6] $end
 $scope struct mem $end
 $var reg 8 c \[0] $end
 $var reg 8 k \[1] $end
@@ -126,7 +126,7 @@ $var reg 8 5" \[6] $end
 $var reg 8 =" \[7] $end
 $upscope $end
 $upscope $end
-$scope struct \[7] $end
+$scope struct [7] $end
 $scope struct mem $end
 $var reg 8 d \[0] $end
 $var reg 8 l \[1] $end