gvfsd-gphoto2 crashed with SIGSEGV in vfs_dir_monitor_destroyed()

[Matthew J. Ballard]

Shooting with my camera using my laptop tethered via gphoto.

Script attached. Its worked rather flawlessly in the past (up to about two weeks ago).

To reproduce, I connect the camera as a MTP/PTP device, eject the location that appears in the file manager, start the script and start shooting. It may grab one or two frames as intended before throwing this error.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gvfs-backends 1.11.4-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
Date: Sat Mar 17 01:37:52 2012
ExecutablePath: /usr/lib/gvfs/gvfsd-gphoto2
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120129)
ProcCmdline: /usr/lib/gvfs/gvfsd-gphoto2 --spawner :1.6 /org/gtk/gvfs/exec_spaw/2
SegvAnalysis:
 Segfault happened at: 0x406b09: mov (%rbx),%rbp
 PC (0x00406b09) ok
 source "(%rbx)" (0xaaaaaaaaaaaaaaaa) not located in a known VMA region (needed readable region)!
 destination "%rbp" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gvfs
StacktraceTop:
 ?? ()
 ?? () 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
 ?? () from /usr/lib/x86_64-linux-gnu/gvfs/libgvfsdaemon.so
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: gvfsd-gphoto2 crashed with SIGSEGV in g_object_unref()
UpgradeStatus: Upgraded to precise on 2012-03-11 (6 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 vfs_dir_monitor_destroyed (user_data=<optimized out>, where_the_object_was=0x7f33ac001c50) at gvfsbackendgphoto2.c:3421
 weak_refs_notify (data=0x7f33b50b8180) at /build/buildd/glib2.0-2.31.20/./gobject/gobject.c:2463
 g_object_unref (_object=0x7f33ac001c50) at /build/buildd/glib2.0-2.31.20/./gobject/gobject.c:2973
 unref_monitor_timeout (data=<optimized out>) at gvfsjobcreatemonitor.c:214
 g_main_context_remove_poll (context=0x7f33ac05eab0, fd=0x0) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3557

[Launchpad Janitor (janitor)]

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