[es6] Make sure temporaries are not allocated in block scope

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5509 matching lines @@
   CHECK(parser.Parse(&info));
   CHECK(i::Compiler::Analyze(&info));
   i::FunctionLiteral* func = info.function();
   i::Scope* module_scope = func->scope();
   i::Scope* outer_scope = module_scope->outer_scope();
   CHECK(outer_scope->is_script_scope());
   CHECK_NULL(outer_scope->outer_scope());
   CHECK_EQ(1, outer_scope->num_modules());
   CHECK(module_scope->is_module_scope());
   CHECK_NOT_NULL(module_scope->module_var());
-  CHECK_EQ(i::INTERNAL, module_scope->module_var()->mode());
+  CHECK_EQ(i::TEMPORARY, module_scope->module_var()->mode());
   i::ModuleDescriptor* descriptor = module_scope->module();
   CHECK_NOT_NULL(descriptor);
   CHECK_EQ(1, descriptor->Length());
   const i::AstRawString* export_name =
       info.ast_value_factory()->GetOneByteString("y");
   const i::AstRawString* local_name =
       descriptor->LookupLocalExport(export_name, &zone);
   CHECK_NOT_NULL(local_name);
   CHECK(local_name->IsOneByteEqualTo("x"));
   i::ZoneList<i::Declaration*>* declarations = module_scope->declarations();
@@ skipping 1297 matching lines @@
     "for (let x in {}) {}",
     "for (let x of []) {}",
     NULL
   };
   // clang-format on
 
   static const ParserFlag always_flags[] = {kAllowHarmonySloppy};
   RunParserSyncTest(context_data, data, kSuccess, NULL, 0, always_flags,
                     arraysize(always_flags));
 }