[Bug 439731] [NEW] Gnome Do (with Docky) crashes after canceling Empty Trash

[Shane S.]

Public bug reported:

Binary package hint: gnome-do

Steps to reproduce:
1.  Open Gnome Do with the Docky theme active and the Trash applet added to the dock.
2.  Right-click the Trash applet, click Empty Trash (it does not need to contain anything)
3.  Click Cancel on the "Empty All of the Items in the Trash?" window.
4.  Right-click the Trash applet, and click Empty Trash again.
5.  Gnome Do should crash with the following:

Marshaling button_release_event signal
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at Docky.Interface.TrashDockItem.EmptyTrash () [0x00000] 
  at Docky.Interface.Menus.SimpleMenuButtonArgs.Action () [0x00000] 
  at Docky.Interface.Menus.AbstractMenuButtonArgs.HandleButtonReleaseEvent (System.Object o, Gtk.ButtonReleaseEventArgs args) [0x00000] 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] 
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GLib.SignalClosure.MarshalCallback(IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Do.Do.Main(System.String[] args)


What is Expected:
The Trash applet will open the "Empty All of the Items in the Trash?" window again, and not crash.

Additional Notes:
This happens consistently with this computer (Dell XPS M1530 Laptop) and my Acer Aspire (32bit Ubuntu on x64 AMD processor).
I've tried clearing all Gnome Do related settings, and it still crashes.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: wl nvidia
Package: gnome-do 0.8.2+dfsg-0~9.04~ppa3
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-do
Uname: Linux 2.6.28-15-generic x86_64
UnreportableReason: This is not a genuine Ubuntu package

** Affects: gnome-do (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
Gnome Do (with Docky) crashes after canceling Empty Trash
https://bugs.launchpad.net/bugs/439731
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