// Copyright 2016 the V8 project authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.varDebug=debug.Debug;functionlistener(event,exec_state,event_data,data){if(event!=Debug.DebugEvent.Break)return;try{varframe_count=exec_state.frameCount();for(vari=0;i<frame_count;i++){varframe=exec_state.frame(i);varscope_count=frame.scopeCount();for(varj=0;j<scope_count;j++){varscope=frame.scope(j);assertTrue(scope.scopeObject().property('').isUndefined());}}}catch(e){print(e,e.stack);exception=e;}}Debug.setListener(listener);(function(a=1){debugger;})();Debug.setListener(null);