f-sport crashed when starting Photo export (any type of export)

[Martin]

Probably duplicate of bug 1351360
https://bugs.launchpad.net/ubuntu/+source/f-spot/+bug/1351360

F-spot crashes as soon as the following menu option is chosen Photo / Export to / folder (or any other export method)
The result is that you cannot export photos in any way. This problem has been in f-spot since the start of 14.04 in 2014.

I get the following error message in the terminal:
(This looks very similar to the error message reported in bug 1351360)

Marshaling activate 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 FSpot.Extensions.ExportMenuItemNode.OnActivated (System.Object o, System.EventArgs e) [0x00000] in <filename unknown>:0
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,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] in <filename unknown>:0
  --- 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] in <filename unknown>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <filename unknown>:0
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] in <filename unknown>:0
   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 FSpot.Driver.Startup()
   at Hyena.Gui.CleanRoomStartup.Startup(Hyena.Gui.StartupInvocationHandler startup)
   at FSpot.Driver.Main(System.String[] args)

(f-spot:1222): GLib-CRITICAL **: Source ID 131 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 297 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 279 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 285 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 60 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 133 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 286 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 294 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 61 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 189 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 288 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 290 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 295 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 277 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 284 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 45 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 291 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 293 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 62 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 195 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 193 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 63 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 283 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 289 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 287 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 282 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 59 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 292 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 280 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 296 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 64 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 281 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 65 was not found when attempting to remove it

(f-spot:1222): GLib-CRITICAL **: Source ID 130 was not found when attempting to remove it

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: f-spot 0.8.2-5.1ubuntu1
Uname: Linux 3.18.0-031800rc3-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jul 29 14:18:29 2015
InstallationDate: Installed on 2014-08-01 (362 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: f-spot
UpgradeStatus: No upgrade log present (probably fresh install)