[Digikam-devel] [digikam] [Bug 331937] New: poll_for_event: assertion !xcb_xlib_threads_sequence_lost fails after editing metadata of a few videos and/or after viewing a few videos

[Christian Gottschall]

https://bugs.kde.org/show_bug.cgi?id=331937

            Bug ID: 331937
           Summary: poll_for_event: assertion
                    !xcb_xlib_threads_sequence_lost fails after editing
                    metadata of a few videos and/or after viewing a few
                    videos
    Classification: Unclassified
           Product: digikam
           Version: 3.5.0
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: digikam-devel at kde.org
          Reporter: christian.gottschall at univie.ac.at

I try to add metadata (description, title, keywords) to a few videos. In order
to be sure that I add the correct data, I view the respective video before
actually entering metadata. After a few videos (sometimes three, sometimes
five), digikam reliably crashes with/after an assertion
!xcb_xlib_threads_sequence_lost. ("digikam: xcb_io.c:274: poll_for_event:
Zusicherung »!xcb_xlib_threads_sequence_lost« nicht erfüllt.")

On stdout/stderr, I get the following messages:

** (digikam:30930): WARNING **: gstvideo: failed to get caps of pad
xvimagesink0:sink
** (digikam:30930): WARNING **: gstvideo: failed to get caps of pad
xvimagesink0:sink
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been
called
[xcb] Aborting, sorry about that.
digikam: xcb_io.c:274: poll_for_event: Zusicherung
»!xcb_xlib_threads_sequence_lost« nicht erfüllt.

Reproducible: Always

Steps to Reproduce:
1. View a few videos.
2. Edit their metadata (title, comments)
3. go to 1.
Actual Results:  
Digikam crashes with:

[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been
called
[xcb] Aborting, sorry about that.
digikam: xcb_io.c:274: poll_for_event: Zusicherung
»!xcb_xlib_threads_sequence_lost« nicht erfüllt.

Expected Results:  
Digikam does not crash.

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