Accessors should be kept alive during their invocation (#5167)

This patch fixes #4900.

The implementation is based on PR #4943, only resolved the conflicts.

Co-authored-by: Robert Fancsik robert.fancsik@h-lab.eu
JerryScript-DCO-1.0-Signed-off-by: Gergo Csizi gergocs@inf.u-szeged.hu

tests/jerry/es.next/regression-test-issue-4900.js

@@ -0,0 +1,41 @@
+// 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 assertArrayEqual(actual, expected) {
+  assert(actual.length === expected.length);
+
+  for (var i = 0; i < actual.length; i++) {
+    assert(actual[i] === expected[i]);
+  }
+}
+
+var i = 0;
+var a = [];
+var JSEtest = [];
+
+JSEtest.__defineGetter__(0, function NaN() {
+  if (i++ > 2) {
+    return;
+  }
+
+  JSEtest.shift();
+  gc();
+  a.push(0);
+  a.concat(JSEtest);
+});
+
+JSEtest[0];
+
+assertArrayEqual(a, [0, 0, 0]);
+assertArrayEqual(JSEtest, []);