Fix lazy property listing for [[Enumerate]] (#3794)

This patch fixes #3784.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

tests/jerry/es2015/regression-test-issue-3784.js

@@ -0,0 +1,32 @@
+// 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.
+
+var expected = ['0', '1', '2', '3', '4', '5'];
+var actual = [];
+
+var v1 = typeof 13.37;
+var v3 = Object(v1);
+var v5 = [13.37,13.37];
+var v6 = [v5];
+v3.__proto__ = v6;
+
+for (var v7 in v3) {
+  actual.push(v7);
+}
+
+assert(actual.length === expected.length);
+
+for (var i = 0; i < actual.length; i++) {
+  assert(actual[i] === expected[i]);
+}