gvfsd-mtp crashed with SIGSEGV in g_object_unref()

[Roland Dreier]

Was trying to copy a file to my Nexus 4, and ejected/unplugged/replugged the phone a few time and finally hit this.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: gvfs-backends 1.15.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4
Uname: Linux 3.8.0-1-generic x86_64
ApportVersion: 2.8-0ubuntu2
Architecture: amd64
Date: Fri Jan 25 17:53:17 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/gvfs/gvfsd-mtp
InstallationDate: Installed on 2012-01-04 (387 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120104)
MarkForUpload: True
ProcCmdline: /usr/lib/gvfs/gvfsd-mtp --spawner :1.7 /org/gtk/gvfs/exec_spaw/12
SegvAnalysis:
 Segfault happened at: 0x7fac2690d0bc: mov 0x20(%rax),%rax
 PC (0x7fac2690d0bc) ok
 source "0x20(%rax)" (0xaaaaaaaaaaaaaaca) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gvfs
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/gvfs/libgvfsdaemon.so
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_value_unset () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gvfsd-mtp crashed with SIGSEGV in g_object_unref()
UpgradeStatus: Upgraded to raring on 2012-12-11 (45 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1101306, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.