shotwell assert failure: shotwell: ../../src/xcb_io.c:274: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.

[Adam Fussell]

* Impact

Clicking the rotate image button a few times will cause the standalone shotwell viewer to crash.
Happens on a whole variety of images

* Test case
- start the shotwell viewer on an image and use rotation, it should work and be stable

* Regression potential
Check that rotation keeps working

[Apport retracing service (apport)]

StacktraceTop:
 __assert_fail_base (fmt=0x7ffc9e306748 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7ffc9c61fb20 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7ffc9c61f96b "../../src/xcb_io.c", line=line@entry=274, function=function@entry=0x7ffc9c61fe26 <__PRETTY_FUNCTION__.14443> "poll_for_event") at assert.c:92
 __GI___assert_fail (assertion=assertion@entry=0x7ffc9c61fb20 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7ffc9c61f96b "../../src/xcb_io.c", line=line@entry=274, function=function@entry=0x7ffc9c61fe26 <__PRETTY_FUNCTION__.14443> "poll_for_event") at assert.c:101
 poll_for_event (dpy=dpy@entry=0x2435ed0) at ../../src/xcb_io.c:271
 poll_for_response (dpy=dpy@entry=0x2435ed0) at ../../src/xcb_io.c:289
 _XEventsQueued (dpy=dpy@entry=0x2435ed0, mode=mode@entry=2) at ../../src/xcb_io.c:363

[Jim Nelson (yorba-jim)]

Ticketed upstream at https://bugzilla.gnome.org/show_bug.cgi?id=736771

[Sebastien Bacher (seb128)]

the new version is in utopic

[negora (negora)]

Is it going to be fixed in Ubuntu 14.04 (Trusty)?

[Sebastien Bacher (seb128)]

@negora, we could. Is that an issue you often run into? What do you do exactly to trigger it?

[negora (negora)]

Hello Sebastien:

The circumstances under which it happens are very similar to the ones described in the first message of this bug report. I've made a fresh install of Xubuntu 14.04 in VirtualBox, installed Shotwell, downloaded a random image from the Internet, tried to rotate it and then the application has got frozen and crashed finally. For my tests I've used the image located here: http://www.freegreatpicture.com/files/26/15992-grass-material.jpg .

Really it happens with every of the images that I've in my computer, no matter if they're of type JPEG or PNG. I've used that one only so that you can test it too. Right now I've installed Shotwell in my production Kubuntu 14.04 (a physical machine) and the error happens too.

Thank you!

[Jim Nelson (yorba-jim)]

Seb, if you're interested in backporting this to Trusty, the change is quite small and contained only to Shotwell in direct-viewer mode:

https://git.gnome.org/browse/shotwell/commit/?id=eb05bc39133ee8ebd3ce303ba2efda226dc10e44

[Sebastien Bacher (seb128)]

Thanks Jim, I backported that to trusty

[negora (negora)]

Thank you both for backporting it so fast :) .

[Chris J Arges (arges)]

Hello Adam, or anyone else affected,

Accepted shotwell into trusty-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/shotwell/0.18.0-0ubuntu4.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Mathew Hodson (mhodson)]

No crash with shotwell (0.18.0-0ubuntu4.3).

[Launchpad Janitor (janitor)]

This bug was fixed in the package shotwell - 0.18.0-0ubuntu4.3

---------------
shotwell (0.18.0-0ubuntu4.3) trusty; urgency=medium

  * debian/patches/git_rotate_error_out.patch:
    - don't hit assert on image rotation (lp: #1368885)
 -- Sebastien Bacher <email address hidden> Tue, 21 Oct 2014 11:44:20 -0400

[Chris J Arges (arges)]

The verification of the Stable Release Update for shotwell has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.