Added missing generator prototype check (#3865)

Fixes #3861

JerryScript-DCO-1.0-Signed-off-by: bence gabor kis [email protected]

Author: kisbg

jerry-core/ecma/operations/ecma-objects.c

@@ -2644,6 +2644,7 @@ ecma_object_check_class_name_is_object (ecma_object_t *obj_p) /**< object */
           || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_RANGE_ERROR_PROTOTYPE)
           || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_REFERENCE_ERROR_PROTOTYPE)
           || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_SYNTAX_ERROR_PROTOTYPE)
+          || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_GENERATOR_PROTOTYPE)
           || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_TYPE_ERROR_PROTOTYPE)
           || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_URI_ERROR_PROTOTYPE)
           || ecma_builtin_is (obj_p, ECMA_BUILTIN_ID_ERROR_PROTOTYPE)

tests/jerry/es2015/regression-test-issue-3861.js

@@ -0,0 +1,26 @@
+// 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.
+
+try {
+  (function() {
+    function* generatorFn() {}
+    g = generatorFn()
+    ownProto = Object.getPrototypeOf(g)
+    sharedProto = Object.getPrototypeOf(ownProto)
+    propertyIsEnumerable(sharedProto)
+  })()
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}