Free scanner info even if for statement parsing is failed. (#3141)

Fixes #3140.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/parser/js/js-parser-statm.c

@@ -1064,6 +1064,13 @@ parser_parse_for_statement_start (parser_context_t *context_p) /**< context */
   if (context_p->next_scanner_info_p->source_p != context_p->source_p
       || ((scanner_for_info_t *) context_p->next_scanner_info_p)->end_location.source_p == NULL)
   {
+    if (context_p->next_scanner_info_p->source_p == context_p->source_p)
+    {
+      /* Even though the scanning is failed, there might be valid statements
+       * inside the for statement which depend on scanner info blocks. */
+      scanner_release_next (context_p, sizeof (parser_for_statement_t));
+    }
+
     /* The prescanner couldn't find the second semicolon or the closing paranthesis. */
     lexer_next_token (context_p);
     parser_parse_expression (context_p, PARSE_EXPR);

tests/jerry/fail/regression-test-issue-3140.js

@@ -0,0 +1,18 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+for (; []; [//])
+function f14(v33, v34) {
+switch (!0x13) {}
+ }