Debugger: require debugger to be active when dealing with breaks.

test/mjsunit/debug-liveedit-patch-positions.js

 // Copyright 2010 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
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug
 // Get the Debug object exposed from the debug context global object.
 
 // Scenario: some function is being edited; the outer function has to have its
 // positions patched. Accoring to a special markup of function text
 // corresponding byte-code PCs should coincide before change and after it.
 
 Debug = debug.Debug
+Debug.setListener(function() {});
 
 eval(
     "function F1() {  return 5; }\n" +
     "function ChooseAnimal(/*$*/ ) {\n" +
     "/*$*/ var x = F1(/*$*/ );\n" +
     "/*$*/ var res/*$*/  =/*$*/ (function() { return 'Cat'; } )();\n" +
     "/*$*/ var y/*$*/  = F2(/*$*/ F1()/*$*/ , F1(/*$*/ )/*$*/ );\n" +
     "/*$*/ if (/*$*/ x.toString(/*$*/ )) { /*$*/ y = 3;/*$*/  } else {/*$*/  y = 8;/*$*/  }\n" +
     "/*$*/ var z = /*$*/ x * y;\n" +
     "/*$*/ return/*$*/  res/*$*/  + z;/*$*/  }\n" +
@@ skipping 71 matching lines @@
 print(pcArray1);
 print(pcArray2);
 
 // Function can be marked for recompilation at any point (especially if we are
 // running with --stress-opt). When we mark function for recompilation we
 // replace it's code with stub. So there is no reliable way to get PCs for
 // function.
 if (pcArray1 && pcArray2) {
   assertArrayEquals(pcArray1, pcArray2);
 }
+
+Debug.setListener(null);