Always inherit language-mode from the outer scope, modules initialize language-mode later

src/ast/scopes.cc

 // 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.
 
 #include "src/ast/scopes.h"
 
 #include <set>
 
 #include "src/accessors.h"
 #include "src/bootstrapper.h"
@@ skipping 71 matching lines @@
       decls_(4, zone),
       scope_type_(scope_type),
       already_resolved_(false) {
   SetDefaults();
   if (outer_scope == nullptr) {
     // If the outer scope is null, this cannot be a with scope. The outermost
     // scope must be a script scope.
     DCHECK_EQ(SCRIPT_SCOPE, scope_type);
   } else {
     asm_function_ = outer_scope_->asm_module_;
-    // Inherit the language mode from the parent scope unless we're a module
-    // scope.
-    if (!is_module_scope()) language_mode_ = outer_scope->language_mode_;
+    // Inherit the language mode from the parent scope.

[neis, 2016/08/17 15:22:52]

Feel free to remove the comment completely.

+    language_mode_ = outer_scope->language_mode_;
     force_context_allocation_ =
         !is_function_scope() && outer_scope->has_forced_context_allocation();
     outer_scope_->AddInnerScope(this);
     scope_inside_with_ = outer_scope_->scope_inside_with_ || is_with_scope();
   }
 }
 
 Scope::Snapshot::Snapshot(Scope* scope)
     : outer_scope_(scope),
       top_inner_scope_(scope->inner_scope_),
@@ skipping 1662 matching lines @@
       function != nullptr && function->IsContextSlot();
   return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - num_global_slots() -
          (is_function_var_in_context ? 1 : 0);
 }
 
 
 int Scope::ContextGlobalCount() const { return num_global_slots(); }
 
 }  // namespace internal
 }  // namespace v8