src/third_party/v8/test/mjsunit/try-catch-extension-object.js

// Copyright 2009 the V8 project authors. All rights reserved.
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// Try catch scopes should be implemented with special extension
// objects so that __proto__ accessors and accessor setters in the
// Object prototype have no effect.

var setterCalled = false;
Object.prototype.__defineSetter__("x", function() { setterCalled = true; });

function runTest(test) {
  setterCalled = false;
  test();
}

function testProto() {
  try {
    throw 42;
  } catch(__proto__) {
    assertEquals(42, __proto__);
  }
}

function testAccessorSetter() {
  try {
    throw 42;
  } catch(x) {
    assertFalse(setterCalled);
    assertEquals(42, x);
  }
}

runTest(testProto);
runTest(testAccessorSetter);