[Qgis-user] Crash and not able to restart after changing theme

[Bernd Vogelgesang]

Hi,

just for fun I wanted to change the theme. When doing so, a python error
window was shown, but had no content but a duplicate of the canvas. Then
everything froze.

I was able to restart once. Fumbling again in the theme setting led to a
sudden crash, and QGIS could not be restarted.

Starting from terminal shows this:

bernd at bernd-Z87M-D3H:~$ qgis
using qt5ct plugin
D-Bus global menu: no
D-Bus system tray: no
QGIS died on signal 11Could not attach to process.  If your uid matches
the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user.  For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Vorgang nicht zulässig.
No thread selected
No stack.
gdb returned 0
Abgebrochen (Speicherabzug geschrieben)

Is this a local problem or worth a bug report?

Cheers,

Bernd

QGIS 3.6.3 on Linux Mint