Fix function calls which name is async and has an extra comma (#4340)

Fixes #4132

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

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

@@ -278,8 +278,16 @@ scanner_scan_primary_expression (parser_context_t *context_p, /**< context */
     {
       if (stack_top == SCAN_STACK_PAREN_EXPRESSION)
       {
-        scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
         parser_stack_pop_uint8 (context_p);
+
+#if ENABLED (JERRY_ESNEXT)
+        if (context_p->stack_top_uint8 == SCAN_STACK_USE_ASYNC)
+        {
+          scanner_add_async_literal (context_p, scanner_context_p);
+        }
+#endif /* ENABLED (JERRY_ESNEXT) */
+
+        scanner_context_p->mode = SCAN_MODE_POST_PRIMARY_EXPRESSION;
         break;
       }
       /* FALLTHRU */

tests/jerry/es.next/regression-test-issue-4132.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 async(p) {
+  return p;
+}
+
+assert(async("X",) === "X")