fix #4112

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/ast/ast.cpp

@@ -1986,6 +1986,7 @@ void ast_manager::delete_node(ast * n) {
     }
 }
 
+
 sort * ast_manager::mk_sort(family_id fid, decl_kind k, unsigned num_parameters, parameter const * parameters) {
     decl_plugin * p = get_plugin(fid);
     if (p)

src/ast/rewriter/rewriter_def.h

@@ -134,7 +134,6 @@ bool rewriter_tpl<Config>::process_const(app * t0) {
 template<typename Config>
 template<bool ProofGen>
 bool rewriter_tpl<Config>::visit(expr * t, unsigned max_depth) {
- // retry:
     TRACE("rewriter_visit", tout << "visiting\n" << mk_ismt2_pp(t, m()) << "\n";);
     expr *  new_t = nullptr;
     proof * new_t_pr = nullptr;

src/ast/shared_occs.cpp

@@ -93,7 +93,9 @@ void shared_occs::operator()(expr * t, shared_occs_mark & visited) {
         expr * curr = fr.first;
         switch (curr->get_kind()) {
         case AST_APP: {
+			
             unsigned num_args = to_app(curr)->get_num_args();
+			
             while (fr.second < num_args) {
                 expr * arg = to_app(curr)->get_arg(fr.second);
                 fr.second++;