From e9da834385a5c3f73d7113dc6cb0aa88f47757a1 Mon Sep 17 00:00:00 2001
From: Robert Fancsik <robert.fancsik@h-lab.eu>
Date: Fri, 14 Jan 2022 10:16:23 +0100
Subject: [PATCH] Fix async identifier parsing in class field position (#4949)

This patch fixes #4927

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik robert.fancsik@h-lab.eu
---
 jerry-core/parser/js/js-scanner.c             |  2 +-
 .../es.next/regression-test-issue-4927.js     | 29 +++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 tests/jerry/es.next/regression-test-issue-4927.js

diff --git a/jerry-core/parser/js/js-scanner.c b/jerry-core/parser/js/js-scanner.c
index 75b2c2aee..2ac7798dd 100644
--- a/jerry-core/parser/js/js-scanner.c
+++ b/jerry-core/parser/js/js-scanner.c
@@ -2861,7 +2861,7 @@ scanner_scan_all (parser_context_t *context_p) /**< context */
             continue;
           }
 
-          if (literal_pool_flags != SCANNER_LITERAL_POOL_FUNCTION)
+          if (literal_pool_flags & SCANNER_LITERAL_POOL_GENERATOR)
           {
             scanner_raise_error (context_p);
           }
diff --git a/tests/jerry/es.next/regression-test-issue-4927.js b/tests/jerry/es.next/regression-test-issue-4927.js
new file mode 100644
index 000000000..d59efb204
--- /dev/null
+++ b/tests/jerry/es.next/regression-test-issue-4927.js
@@ -0,0 +1,29 @@
+// 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.
+
+class C1 { async }
+class C2 { async; constructor() {} }
+class C3 { async = 5.1; constructor() {} }
+
+assert((new C1).async === undefined);
+assert((new C2).async === undefined);
+assert((new C3).async === 5.1);
+
+try {
+  eval('class C1 { async* }');
+  assert(false);
+} catch (e) {
+  assert(e instanceof SyntaxError);
+}
+