[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 8005479a32670b05c34eef744975b0d47d86af17..7c3fe704e4c213af4a9cbfc19908693cf103de34 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -907,8 +907,10 @@ 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);
     }
 
@@ -1386,7 +1388,7 @@ 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);
@@ -1437,7 +1439,7 @@ 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;