text: // Multiple Debugger objects can set breakpoints at the same instruction.
  
  var g = newGlobal();
  function attach(g, i) {
      var dbg = Debugger(g);
      dbg.onDebuggerStatement = function (frame) {
          var s = frame.eval("f").return.script;
          var offs = s.getLineOffsets(g.line0 + 3);
          for (var j = 0; j < offs.length; j++)
              s.setBreakpoint(offs[j], {hit: function () { g.log += "" + i; }});
      };
  }
  
  g.eval("var line0 = Error().lineNumber;\n" +
         "function f() {\n" +     // line0 + 1
         "    log += 'a';\n" +    // line0 + 2
         "    log += 'b';\n" +    // line0 + 3
         "}\n");
  
  for (var i = 0; i < 3; i++)
      attach(g, i);
  
  g.log = '';
  g.eval('debugger;');
  g.log += 'x';
  g.f();
  assertEq(g.log, 'xa012b');
  