Add error check to VM_OC_CLASS_INHERITANCE (#3122)

ecma_op_object_get_by_magic_id can throw an exception

Fixes #3121

JerryScript-DCO-1.0-Signed-off-by: Daniel Balla dballa@inf.u-szeged.hu

jerry-core/vm/vm.c

@@ -1405,6 +1405,13 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
           {
             ecma_value_t super_prototype_value = ecma_op_object_get_by_magic_id (super_class_p,
                                                                                  LIT_MAGIC_STRING_PROTOTYPE);
+
+            if (ECMA_IS_VALUE_ERROR (super_prototype_value))
+            {
+              result = super_prototype_value;
+              goto error;
+            }
+
             if (ecma_get_object_type (super_class_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION
                 && !ecma_is_value_object (super_prototype_value))
             {

tests/jerry/fail/regresssion-test-issue-3121.js

@@ -0,0 +1,17 @@
+// 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 Base = function ( ) { }.bind( );
+Object.defineProperty ( Base , 'prototype' , { get : function ( ) {$} } );
+class C extends Base { }