Fix RegExp matching on right brackets and braces.

JerryScript-DCO-1.0-Signed-off-by: László Langó llango.u-szeged@partner.samsung.com

Author: LaszloLango

jerry-core/parser/regexp/re-parser.cpp

@@ -853,15 +853,15 @@ re_parse_next_token (re_parser_ctx_t *parser_ctx_p, /**< RegExp parser context *
     {
       advance = 1;
       out_token_p->type = RE_TOK_START_CHAR_CLASS;
+
       if (re_lookup (parser_ctx_p->iter, 1) == LIT_CHAR_CIRCUMFLEX)
       {
         advance = 2;
         out_token_p->type = RE_TOK_START_INV_CHAR_CLASS;
       }
+
       break;
     }
-    case LIT_CHAR_RIGHT_SQUARE:
-    case LIT_CHAR_RIGHT_BRACE:
     case LIT_CHAR_QUESTION:
     case LIT_CHAR_ASTERISK:
     case LIT_CHAR_PLUS:

tests/jerry/regression-test-issue-257.js

@@ -0,0 +1,21 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// 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.
+
+var r;
+r = new RegExp("]");
+assert (r.exec("]") == "]");
+
+r = new RegExp("}");
+assert (r.exec("}") == "}");