[ubuntu-mono] [Bug 291189] Re: f-spot crashes on startup when color management enabled

[Chris Coulson]

** Description changed:

  Binary package hint: f-spot
  
  1) Interpid, upgraded from Hardy on the release date, amd64
  2) f-spot 0.5.0.3-0ubuntu2
  3) f-spot starts with color managed display
  4) When I enable color management from f-spot's preferences menu, f-spot won't start anymore. Starting it from a console gives
  $ f-spot
  [Info  17:33:27.950] Initializing DBus
  [Info  17:33:28.056] Initializing Mono.Addins
  [Info  17:33:28.418] Starting new FSpot server
  error checking orientation
  [Info  17:33:30.103] Starting BeagleService
  [Info  17:33:30.103] Hack for gnome-settings-daemon engaged
  
  (f-spot:7434): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without calling gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the data stream to the loader before dropping the last reference.
  error checking orientation
  [Info  17:33:39.553] Exiting
  rose at harper:~$ f-spot
  [Info  17:33:41.237] Initializing DBus
  [Info  17:33:41.323] Initializing Mono.Addins
  [Info  17:33:41.455] Starting new FSpot server
  error checking orientation
  [Info  17:33:42.425] Starting BeagleService
  [Info  17:33:42.425] Hack for gnome-settings-daemon engaged
  Exception in Gtk# callback delegate
    Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
  System.NullReferenceException: Object reference not set to an instance of an object
    at TagSelectionWidget.IconDataFunc (Gtk.TreeViewColumn column, Gtk.CellRenderer renderer, TreeModel model, TreeIter iter) [0x00000] 
    at GtkSharp.TreeCellDataFuncWrapper.NativeCallback (IntPtr tree_column, IntPtr cell, IntPtr tree_model, IntPtr iter, IntPtr data) [0x00000] 
     at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
     at GtkSharp.TreeCellDataFuncWrapper.NativeCallback(IntPtr tree_column, IntPtr cell, IntPtr tree_model, IntPtr iter, IntPtr data)
     at GtkSharp.TreeCellDataFuncWrapper.NativeCallback(IntPtr , IntPtr , IntPtr , IntPtr , IntPtr )
     at Gtk.Application.gtk_main()
     at Gtk.Application.gtk_main()
     at Gtk.Application.Run()
     at Gnome.Program.Run()
     at FSpot.Driver.Main(System.String[] args)
  
  
  I can disable color management via gconf-editor and it starts flawlessly again.
+ 
+ ==========
+ 
+ The impact of this bug is that if a user enables Color Management out of
+ curiosity, F-Spot will not work next start next time they try to use it.
+ Although the user can fix it by changing a gconf key, this will not be
+ obvious to most users.
+ 
+ The bug has been addressed by backporting the patch from SVN. The crash
+ is caused because a null check is performed on the wrong object, and the
+ patch attached addresses this.
+ 
+ TEST CASE:
+ 1) With F-Spot version 0.5.0.3-0ubuntu2, go to Edit -> Preferences and enable 'Color Management'.
+ 2) Close F-Spot
+ 3) Attempt to re-open F-Spot and notice that is crashes immediately.
+ 4) Recover F-Spot by doing "gconftool-2 --type bool -s /apps/f-spot/ui/color_management_enabled 0"
+ 5) Install the version of F-Spot with the patch
+ 6) Enable 'Color Management' as before.
+ 7) Close F-Spot
+ 8) Open F-Spot again and notice that it no longer crashes

-- 
f-spot crashes on startup when color management enabled
https://bugs.launchpad.net/bugs/291189
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