[parser] Skipping inner funcs: produce the same scopes / variables for (some) loops.

src/parsing/preparser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/parsing/parser-base.h"
@@ skipping 1318 matching lines @@
   V8_INLINE PreParserStatement CreateForEachStatementTDZ(
       PreParserStatement init_block, const ForInfo& for_info, bool* ok) {
     return init_block;
   }
 
   V8_INLINE StatementT DesugarLexicalBindingsInForStatement(
       PreParserStatement loop, PreParserStatement init,
       PreParserExpression cond, PreParserStatement next,
       PreParserStatement body, Scope* inner_scope, const ForInfo& for_info,
       bool* ok) {
+    // See Parser::DesugarLexicalBindingsInForStatement.
+    for (int i = 0; i < for_info.bound_names.length(); i++) {
+      inner_scope->DeclareVariableName(for_info.bound_names[i],
+                                       for_info.parsing_result.descriptor.mode);
+    }
     return loop;
   }
 
   V8_INLINE PreParserStatement BuildParameterInitializationBlock(
       const PreParserFormalParameters& parameters, bool* ok) {
     return PreParserStatement::Default();
   }
 
   V8_INLINE PreParserStatement
   BuildRejectPromiseOnException(PreParserStatement init_block) {
@@ skipping 309 matching lines @@
     function_state_->NextMaterializedLiteralIndex();
     function_state_->NextMaterializedLiteralIndex();
   }
   return EmptyExpression();
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H