text: // Copyright 2016 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 exception = null;
  
  function listener(event, exec_state, event_data, data) {
    if (event != Debug.DebugEvent.Break) return;
    try {
      assertThrows(() => exec_state.frame(0).evaluate("bar.baz"), ReferenceError);
    } catch (e) {
      exception = e;
    }
  }
  
  Debug.setListener(listener);
  
  (function() {
    debugger;    // bar is still in TDZ at this point.
    let bar = 1;
    (x => bar);  // force bar to be context-allocated.
  })();
  
  Debug.setListener(null);
  assertNull(exception);
  