add: dump("failed to get command manager number "+i+"\n"); 
context: function GetComposerController(){  var numControllers = window.content.controllers.getControllerCount();    // count down to find a controller that supplies a nsIControllerCommandManager interface  for (var i = numControllers; i >= 0 ; i --)  {    var commandManager = null;        try {       var controller = window.content.controllers.getControllerAt(i);      var interfaceRequestor = controller.QueryInterface(Components.interfaces.nsIInterfaceRequestor);      if (!interfaceRequestor) continue;          commandManager = interfaceRequestor.getInterface(Components.interfaces.nsIControllerCommandManager);    } catch(ex) {        }    if (commandManager)      return commandManager;  }  dump("Failed to find a controller to register commands with\n");  return null;}
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/632d5d57c2abc35b8ad3ce5a7c0d0e1fdace5299/ComposerCommands.js/buggy/editor/ui/composer/content/ComposerCommands.js