fix warning
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		|  | @ -437,6 +437,7 @@ impl Visitor { | |||
|                 #(#lets)* | ||||
|                 #make_expr_fn::<#ty>(|#infallible_var| { | ||||
|                     let #retval_var = #check_literal; | ||||
|                     #[allow(unreachable_code)] | ||||
|                     match #retval_var { | ||||
|                         #variant_or_type { .. } => #retval_var, | ||||
|                         #[allow(unreachable_patterns)] | ||||
|  |  | |||
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