src/v8/test/debugger/debug/regress/regress-1081309.js

// Copyright 2008 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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Debug = debug.Debug

// Make sure that the backtrace command can be processed when the receiver is
// undefined.
let listenerCalled = false;
let exceptionThrown = false;

function listener(event, exec_state, event_data, data) {
  try {
    if (event == Debug.DebugEvent.Exception) {
      // The expected backtrace is
      // 1: g
      // 0: [anonymous]

      assertEquals(2, exec_state.frameCount());
      assertEquals("g", exec_state.frame(0).func().name());
      assertEquals("", exec_state.frame(1).func().name());

      listenerCalled = true;
    }
  } catch (e) {
    print(e);
    exceptionThrown = true;
  };
};

// Add the debug event listener.
Debug.setListener(listener);

// Call method on undefined.
function g() {
  (void 0).f();
};

// Break on the exception to do a backtrace with undefined as receiver.
Debug.setBreakOnException(true);
try {
  g();
} catch(e) {
  // Ignore the exception "Cannot call method 'x' of undefined"
}

assertFalse(exceptionThrown, "exception in listener");
// Make sure that the debug event listener vas invoked.
assertTrue(listenerCalled, "listener not called");