Fix initializer detection in for-in expressions. (#3884)

Also fix column update when comments are parsed.

Fixes #3882

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

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

@@ -388,7 +388,7 @@ lexer_skip_spaces (parser_context_t *context_p) /**< context */
     context_p->source_p++;
 
     if (context_p->source_p < source_end_p
-        && IS_UTF8_INTERMEDIATE_OCTET (context_p->source_p[0]))
+        && !IS_UTF8_INTERMEDIATE_OCTET (context_p->source_p[0]))
     {
       context_p->column++;
     }

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

@@ -1336,7 +1336,7 @@ parser_parse_for_statement_start (parser_context_t *context_p) /**< context */
           parser_emit_cbc_ext (context_p, is_for_in ? CBC_EXT_FOR_IN_GET_NEXT
                                                     : CBC_EXT_FOR_OF_GET_NEXT);
 
-          if (context_p->next_scanner_info_p->source_p == context_p->source_p)
+          if (context_p->next_scanner_info_p->source_p == (context_p->source_p + 1))
           {
             JERRY_ASSERT (context_p->next_scanner_info_p->type == SCANNER_TYPE_INITIALIZER);
 

tests/jerry/fail/regression-test-issue-3882.js

@@ -0,0 +1,15 @@
+// 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(let{[function(){}]:{}} = ()=>{} in []) ;