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      1 // Copyright 2016 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Flags: --ignition-filter=f --expose-debug-as debug
      6 
      7 var Debug = debug.Debug;
      8 
      9 var break_count = 0;
     10 
     11 function f() {
     12   debugger;
     13 }
     14 
     15 function listener(event, exec_data) {
     16   if (event != Debug.DebugEvent.Break) return;
     17   break_count++;
     18 }
     19 
     20 f();
     21 assertEquals(0, break_count);
     22 
     23 Debug.setListener(listener);
     24 
     25 f();
     26 assertEquals(1, break_count);
     27 
     28 Debug.setListener(null);
     29 
     30 f();
     31 assertEquals(1, break_count);
     32