test/mjsunit/regress/regress-crbug-107996.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
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//       with the distribution.
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//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// Flags: --expose-debug-as debug

Debug = debug.Debug;

Debug.setListener(listener);

var fourteen;
var four_in_debugger = [];

function listener(event, exec_state, event_data, data) {
  if (event == Debug.DebugEvent.Break) {
    for (var i = 0; i < exec_state.frameCount(); i++) {
      var frame = exec_state.frame(i);
      four_in_debugger[i] = frame.evaluate("four", false).value();
    }
  }
}

function f1() {
  var three = 3;
  var four = 4;
  (function f2() {
     var seven = 7;
     (function f3() {
        debugger;
        fourteen = three + four + seven;
     })();
  })();
}

f1();
assertEquals(14, fourteen);
assertEquals(4, four_in_debugger[0]);
assertEquals(4, four_in_debugger[1]);
assertEquals(4, four_in_debugger[2]);

Debug.setListener(null);