banshee produces "fatal error" when syncing device

[[mrs_sheep]]

Tried to sync my walkman, reproduceable.

When trying to exit the error message (impossible) CPU load explodes.

Message:

Encountered Fatal Error
Object reference not set to an instance of an object

An unhandled exception was thrown: Object reference not set to an instance of an object

at Banshee.Sources.PrimarySource.IncrementAddedTracks () <0x0004d>
at Banshee.Dap.DapSource.OnTrackTranscodeError (Banshee.Collection.TrackInfo) <0x00067>
at Banshee.MediaEngine.TranscoderService.OnError (object,Banshee.MediaEngine.TranscoderErrorArgs) <0x0007c>
at Banshee.GStreamer.Transcoder.OnError (Banshee.Collection.TrackInfo,string) <0x00063>
at Banshee.GStreamer.Transcoder.OnNativeError (intptr,intptr,intptr) <0x000f4>
at (wrapper native-to-managed) Banshee.GStreamer.Transcoder.OnNativeError (intptr,intptr,intptr) <0x00083>
at (wrapper managed-to-native) Gtk.Application.gtk_main () <0x00054>
at Gtk.Application.Run () <0x0000b>
at Banshee.Gui.GtkBaseClient.Run () <0x0005f>
at Banshee.Gui.GtkBaseClient.Startup () <0x00049>
at Hyena.Gui.CleanRoomStartup.Startup (Hyena.Gui.CleanRoomStartup/StartupInvocationHandler) <0x0008e>

.NET Version: 4.0.30319.1
OS Version: Unix 3.5.0.17

Assembly Version Information:

taglib-sharp (2.1.0.0)
NDesk.DBus.Proxies (0.0.0.0)
Mtp (2.6.0.0)
libgpod-sharp (1.1.0.0)
Banshee.Dap.Mtp (2.6.0.0)
Banshee.Dap.MassStorage (2.6.0.0)
Banshee.Dap.AppleDevice (2.6.0.0)
Mono.Zeroconf.Providers.AvahiDBus (4.0.0.90)
Mono.Zeroconf (4.0.0.90)
Banshee.PlayQueue (2.6.0.0)
Banshee.MiroGuide (2.6.0.0)
Mono.Media (2.6.0.0)
Banshee.Jamendo (2.4.0.0)
Banshee.InternetRadio (2.6.0.0)
Banshee.InternetArchive (2.6.0.0)
Banshee.FileSystemQueue (2.6.0.0)
zeitgeist-sharp (0.8.0.0)
Banshee.ZeitgeistDataprovider (2.4.0.0)
notify-sharp (0.4.0.0)
Banshee.SoundMenu (2.6.0.0)
Banshee.Podcasting (2.6.0.0)
gkeyfile-sharp (1.0.0.0)
Banshee.OpticalDisc (2.6.0.0)
Banshee.OpenVP.Visualizations (2.4.0.0)
OpenVP.Core (2.4.0.0)
OpenVP (2.4.0.0)
Banshee.OpenVP (2.4.0.0)
Banshee.MultimediaKeys (2.6.0.0)
Banshee.Mpris (2.6.0.0)
Banshee.LibraryWatcher (2.6.0.0)
Banshee.LastfmStreaming (2.6.0.0)
Banshee.LastfmFingerprint (2.4.0.0)
Lastfm (2.6.0.0)
Migo (2.6.0.0)
Banshee.Emusic (2.6.0.0)
Banshee.Dap (2.6.0.0)
Banshee.Daap (2.6.0.0)
Banshee.CoverArt (2.6.0.0)
Banshee.Bpm (2.6.0.0)
Banshee.AlbumArtWriter (2.4.0.0)
Banshee.Wikipedia (2.6.0.0)
Banshee.WebBrowser (2.6.0.0)
Banshee.Lyrics (2.4.0.0)
Banshee.Lastfm (2.6.0.0)
pango-sharp (2.12.0.0)
Mono.Cairo (4.0.0.0)
Banshee.Fixup (2.6.0.0)
Banshee.DuplicateSongDetector (2.4.0.0)
Banshee.Widgets (2.6.0.0)
gio-sharp (2.14.0.0)
gudev-sharp (1.0.0.0)
Banshee.Gio (2.6.0.0)
Banshee.GStreamer (2.6.0.0)
System.Configuration (4.0.0.0)
gconf-sharp (2.24.0.0)
Banshee.Gnome (2.6.0.0)
Banshee.NowPlaying (2.6.0.0)
System.Xml (4.0.0.0)
Banshee.Core (2.6.0.0)
Hyena.Data.Sqlite (2.6.0.0)
gdk-sharp (2.12.0.0)
Mono.Addins (0.6.0.0)
atk-sharp (2.12.0.0)
Hyena.Gui (2.6.0.0)
Mono.Posix (4.0.0.0)
gtk-sharp (2.12.0.0)
Banshee.ThickClient (2.6.0.0)
Nereid (2.6.0.0)
DBus.Proxies (0.0.0.0)
dbus-sharp-glib (1.0.0.0)
System.Core (4.0.0.0)
Hyena (2.6.0.0)
dbus-sharp (1.0.0.0)
glib-sharp (2.12.0.0)
System (4.0.0.0)
Banshee.Services (2.6.0.0)
Banshee (2.6.0.0)
mscorlib (4.0.0.0)

Platform Information: Linux 3.5.0-17-generic x86_64 x86_64 GNU/Linux

Disribution Information:

[/etc/lsb-release]
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.10
DISTRIB_CODENAME=quantal
DISTRIB_DESCRIPTION="Ubuntu 12.10"

[/etc/os-release]
NAME="Ubuntu"
VERSION="12.10, Quantal Quetzal"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu quantal (12.10)"
VERSION_ID="12.10"

[/etc/debian_version]
wheezy/sid

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: banshee 2.6.0-1ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
CheckboxSubmission: 236a6ecab42f5f00606cd37059f07dc1
CheckboxSystem: 5a5f83b1a22238119772e525a902a417
Date: Sat Oct 27 08:01:57 2012
InstallationDate: Installed on 2011-05-20 (525 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MarkForUpload: True
SourcePackage: banshee
UpgradeStatus: Upgraded to quantal on 2012-10-21 (6 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[gnap (dorian-burihabwa)]

I have had the same issue since I swicthed to 13.04 (clean install). The error happens when the synchronization encounters the first file to convert (flac to mp3). All the files that didn't require transcoding and which transfer was started before, were successfully copied to the device.

Leaving banshee hanging for a few minutes (more than 10), the CPU load remains at 100% and the transfer does not complete.