[parser] report illegal token error in ParseMemberExpressionContinuation()

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index 4ed8f12841cf4afc95f70e090b42f158ac3bc080..5415eef42c78180c1e73e65d225882b1918ce8af 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -2616,6 +2616,11 @@ ParserBase<Traits>::ParseMemberExpressionContinuation(
             ParseTemplateLiteral(expression, pos, classifier, CHECK_OK);
         break;
       }
+      case Token::ILLEGAL: {
+        ReportUnexpectedTokenAt(scanner()->peek_location(), Token::ILLEGAL);
+        *ok = false;
+        return this->EmptyExpression();
+      }
       default:
         return expression;
     }