[parser] Enforce module-specific identifier restriction

src/parsing/parser.cc

Index: src/parsing/parser.cc
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc
index 22f74807fbadfd382d89c298158638c4bbedcdbd..6bfb7d2205dc7d2eba7afa80966ff7aabcce2354 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -929,8 +929,10 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
     bool ok = true;
     int beg_pos = scanner()->location().beg_pos;
     if (info->is_module()) {
+      parsing_module_ = true;
       ParseModuleItemList(body, &ok);
     } else {
+      parsing_module_ = false;
       ParseStatementList(body, Token::EOS, &ok);
     }
 
@@ -1364,7 +1366,7 @@ void* Parser::ParseExportClause(ZoneList<const AstRawString*>* export_names,
     // Keep track of the first reserved word encountered in case our
     // caller needs to report an error.
     if (!reserved_loc->IsValid() &&
-        !Token::IsIdentifier(name_tok, STRICT, false)) {
+        !Token::IsIdentifier(name_tok, STRICT, false, true)) {
       *reserved_loc = scanner()->location();
     }
     const AstRawString* local_name = ParseIdentifierName(CHECK_OK);
@@ -1415,7 +1417,7 @@ ZoneList<ImportDeclaration*>* Parser::ParseNamedImports(int pos, bool* ok) {
     if (CheckContextualKeyword(CStrVector("as"))) {
       local_name = ParseIdentifierName(CHECK_OK);
     }
-    if (!Token::IsIdentifier(scanner()->current_token(), STRICT, false)) {
+    if (!Token::IsIdentifier(scanner()->current_token(), STRICT, false, true)) {
       *ok = false;
       ReportMessage(MessageTemplate::kUnexpectedReserved);
       return NULL;
@@ -4681,7 +4683,7 @@ PreParser::PreParseResult Parser::ParseLazyFunctionBodyWithPreParser(
   }
   PreParser::PreParseResult result = reusable_preparser_->PreParseLazyFunction(
       language_mode(), function_state_->kind(), scope_->has_simple_parameters(),
-      logger, bookmark);
+      parsing_module_, logger, bookmark);
   if (pre_parse_timer_ != NULL) {
     pre_parse_timer_->Stop();
   }