src/v8/test/debugger/debug/regress/regress-crbug-222893.js

// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// 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
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Flags: --noanalyze-environment-liveness

Debug = debug.Debug

var error = null;
var array = ["a", "b", "c"];
var result = null;

function listener(event, exec_state, event_data, data) {
  try {
    if (event == Debug.DebugEvent.Break) {
      result = exec_state.frame(0).evaluate('arguments').value();
    }
  } catch (e) {
    error = e;
  }
};

Debug.setListener(listener);


function f(a, b) {
  arguments;
  debugger;  // Arguments object is already materialized.
}

result = null;
f.apply(this, array);
assertArrayEquals(array, result);
result = null;
f("a", "b", "c");
assertArrayEquals(array, result);
assertNull(error);

function g(a, b) {
  debugger;  // Arguments object is not yet materialized.
}

result = null;
g.apply(this, array);
assertArrayEquals(array, result);
result = null;
g("a", "b", "c");
assertArrayEquals(array, result);
assertNull(error);

function h(a, b) {
  var arguments = undefined;
  debugger;  // Arguments already used as local variable.
}

result = null;
h.apply(this, array);
assertEquals(undefined, result);
result = null;
h("a", "b", "c");
assertEquals(undefined, result);
assertNull(error);