test/mjsunit/regress/regress-crbug-491943.js

// Copyright 2015 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.

// Flags: --expose-debug-as debug

var Debug = debug.Debug;
var receiver = null;

Debug.setListener(function(event, exec_state, event_data, data) {
  if (event != Debug.DebugEvent.Break) return;
  receiver = exec_state.frame(0).evaluate('this').value();
});


function f() {
  var context_local = 1;
  (function() { return context_local; })();
  debugger;
}

var expected = {};
f.call(expected);

assertEquals(expected, receiver);