Exception which crashes banshee when using mirage playlist generator

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Drag a certain music file to Mirage "Playlist generator"
2. After some time banshee crashes when mirage tries to retrieve new 
playlist entries

What version of the product are you using? On what operating system?
Ubuntu Karmic (happened also on Jaunty)
banshee 1.5.1-1
banshee-extension-mirage 0.5.0-2

Please provide any additional information below.

Stack trace:

Mirage - Faulty SCMS id=10353 d=0
Mirage - playlist in: 2250ms
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 Banshee.Mirage.PlaylistGeneratorSource
+<UpdatePlaylist>c__AnonStorey0.<>m__0 (System.Object , System.EventArgs ) 
[0x00000] 
  at Gtk.Application+InvokeCB.Invoke () [0x00000] 
  at GLib.Timeout+TimeoutProxy.Handler () [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, 
Boolean is_terminal)
   at GLib.Timeout+TimeoutProxy.Handler()
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Banshee.Gui.GtkBaseClient.Run()
   at Banshee.Gui.GtkBaseClient.Startup()
   at Hyena.Gui.CleanRoomStartup.Startup
(Hyena.Gui.StartupInvocationHandler startup)
   at Banshee.Gui.GtkBaseClient.Startup()
   at Banshee.Gui.GtkBaseClient.Startup(System.String[] args)
   at Nereid.Client.Main(System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.Reflection.Assembly , 
System.String[] )
   at System.AppDomain.ExecuteAssemblyInternal(System.Reflection.Assembly 
a, System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.String assemblyFile, 
System.Security.Policy.Evidence assemblySecurity, System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.String assemblyFile)
   at Booter.Booter.BootClient(System.String clientName)
   at Booter.Booter.Main()
libmirageaudio: destroy.

-----
I also have imported my huge music library from scratch and reset mirage 
(in the tools menu of banshee). The error remains.

Original issue reported on code.google.com by times.pr...@googlemail.com on 25 Oct 2009 at 4:31

[GoogleCodeExporter]

Are you saying this only happens with a specific file ?
If yes, please check if mirage is able to analyze it properly :
- Start banshee from a terminal
- Remove the file from your library
- Import it again. Mirage should analyze it again. Watch the terminal output to 
see
if there's any error.

Original comment by bertrand.lorentz@gmail.com on 26 Oct 2009 at 8:37

• Added labels: Product-Mirage

[GoogleCodeExporter]

I investigated further and found out that it happens only with certain files. 
As you 
supposed i removed the file from the library and imported it again. Mirage 
correctly 
analyzed it again:

libmirageaudio: rate=44100, resampling=0,500000
libmirageaudio: decoding /media/Data/backup_sync/Musik/Deutsch/Mia/Zirkus/10 
Mia - 
S.O.S..mp3
libmirageaudio: EOS Message sent
libmirageaudio: EOS Message received
libmirageaudio: time = 2630,000000
libmirageaudio: frames=2583 (maxhops=2583), size=513
Mirage - decoded frames=2583,size=513
Mirage - mfcc Execution Time: 100ms
Mirage - scms created in: 31ms
Mirage - Total Execution Time: 3076ms

The following discoverings could be helpful:
If banshee crashes when i drag a song on the mirage "Playlist Generator" i have 
less 
than 6 songs in the mirage playlist on next startup.
When it does not crash after i drag&drop a song it finds 6 songs and starts 
playing 
with the first one.

The number of tracks in banshee.db and mirage.db do not match (9186 in 
CoreTracks 
vs. almost 12000 in mirage). What does the "Status" column in the table 
MirageProcessed describe? I found entries with Status == -2 and -1 and 0.

Original comment by times.pr...@googlemail.com on 26 Oct 2009 at 11:02

[GoogleCodeExporter]

This issue can be closed.
I finally recreated my databases from scratch and all works fine now with 
newest 
banshee (1.5.3) and mirage (0.6).

Original comment by times.pr...@googlemail.com on 9 Feb 2010 at 8:46

[GoogleCodeExporter]

Thanks for the heads up !

I also added some null check before the latest release, so if a similar 
situation
happens, Mirage shouldn't crash.

Original comment by bertrand.lorentz@gmail.com on 9 Feb 2010 at 9:14

• Changed state: Fixed