[Users] [Bug 4275] New: assertion "xcb_xlib_threads_sequence_lost" failed

[noreply at thewildbeast.co.uk]

https://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=4275

            Bug ID: 4275
           Summary: assertion "xcb_xlib_threads_sequence_lost" failed
           Product: Claws Mail
           Version: 3.17.3
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Other
          Assignee: users at lists.claws-mail.org
          Reporter: devel at sumpfralle.de

Created attachment 2017
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https://www.thewildbeast.co.uk/claws-mail/bugzilla/attachment.cgi?id=2017&action=edit
stacktrace example

I enjoy using claws-mail, but sadly from time to time it crashes unexpectedly.

Thus I started to collect stack traces with gdb ("LANG= gdb claws-mail").

Attached you find a few of these stack traces.

They have the following lines in common:

```
[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.
claws-mail: ../../src/xcb_io.c:260: poll_for_event: Zusicherung
»!xcb_xlib_threads_sequence_lost« nicht erfüllt.
```

Somehow the above lines still contain some German string ("Zusicherung ...
nicht erfüllt"). It means something like "assertion ... failed".

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