Property modifiers should not be checked before an equals. (#3509)

Fixes #3434.

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

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

@@ -2966,6 +2966,7 @@ lexer_check_property_modifier (parser_context_t *context_p) /**< context */
       || context_p->source_p[0] == LIT_CHAR_COMMA
       || context_p->source_p[0] == LIT_CHAR_RIGHT_BRACE
       || context_p->source_p[0] == LIT_CHAR_LEFT_PAREN
+      || context_p->source_p[0] == LIT_CHAR_EQUALS
 #endif /* ENABLED (JERRY_ES2015) */
       || context_p->source_p[0] == LIT_CHAR_COLON)
   {

tests/jerry/es2015/regression-test-issue-3434.js

@@ -0,0 +1,19 @@
+// 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.
+
+function g({
+    ["y"]: {
+        get = 5
+    }
+}) {}