Exception in UniverseManager when computer is left unattended for many hours

[Bruno Santos]

Binary package hint: gnome-do

I noticed Do was missing when I left the computer unattended for some time. This night I left do running on a console and got the following after many hours:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at Do.Core.UniverseManager.ReloadSource (Do.Universe.ItemSource source) [0x00000]
  at Do.Core.UniverseManager.UniverseUpdateLoop () [0x00000]
**
ERROR:../../mono/io-layer/handles-private.h:160:_wapi_handle_set_signal_state: assertion failed: (thr_ret == 0)
Stacktrace:

  at (wrapper managed-to-native) System.Threading.NativeEventCalls.SetEvent_internal (intptr) <0x00048>
  at (wrapper managed-to-native) System.Threading.NativeEventCalls.SetEvent_internal (intptr) <0xffffffff>
  at System.Threading.EventWaitHandle.Set () <0x00027>
  at (wrapper remoting-invoke-with-check) System.Threading.EventWaitHandle.Set () <0xffffffff>
  at System.Net.WebAsyncResult.SetCompleted (bool,System.IO.Stream) <0x00063>
  at System.Net.HttpWebRequest.SetWriteStream (System.Net.WebConnectionStream) <0x001eb>
  at (wrapper remoting-invoke-with-check) System.Net.HttpWebRequest.SetWriteStream (System.Net.WebConnectionStream) <0xffffffff>
  at System.Net.WebConnection.InitConnection (object) <0x00247>
  at (wrapper runtime-invoke) System.Object.runtime_invoke_void__this___object (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

 /usr/bin/cli [0x429e65]
 /lib/libpthread.so.0 [0x7f1c97ff8080]
 /lib/libc.so.6(gsignal+0x35) [0x7f1c97a24fb5]
 /lib/libc.so.6(abort+0x183) [0x7f1c97a26bc3]
 /usr/lib/libglib-2.0.so.0(g_assertion_message+0x113) [0x7f1c986714f3]
 /usr/lib/libglib-2.0.so.0 [0x7f1c98671a82]
 /usr/bin/cli [0x504a81]
 /usr/bin/cli [0x5056d9]
 [0x41e5f5d8]

Debug info from gdb:

Couldn't get registers: No such process.
Couldn't get registers: No such process.
Couldn't get registers: No such process.
Quitting: ptrace: No such process.

I use the Docky, and various plugins (is there a simple way to list those in use?).

gnome-do: 0.8.1.3-0ubuntu2
gnome-do-plugins: 0.8.1.3+dfsg-0ubuntu3