Bug#890882: freecad: Freecad fails to start with Assertion `!xcb_xlib_threads_sequence_lost' failed

[Matthias Heinz]

Package: freecad
Version: 0.16.6712+dfsg1-1+b2
Severity: normal

Hi,

I fear some update has broken FreeCAD on my system. It fails to start for me 
with:

failed to create drawable 
[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.
freecad: ../../src/xcb_io.c:259: poll_for_event: Assertion `!
xcb_xlib_threads_sequence_lost' failed.


Any ideas how to solve this?

Best regards
Matthias




-- System Information:
Debian Release: buster/sid
  APT prefers oldstable-proposed-updates
  APT policy: (500, 'oldstable-proposed-updates'), (500, 'unstable'), (1, 
'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.15.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE= 
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages freecad depends on:
ii  libboost-atomic1.62.0           1.62.0+dfsg-5
ii  libboost-chrono1.62.0           1.62.0+dfsg-5
ii  libboost-date-time1.62.0        1.62.0+dfsg-5
ii  libboost-filesystem1.62.0       1.62.0+dfsg-5
ii  libboost-program-options1.62.0  1.62.0+dfsg-5
ii  libboost-python1.62.0           1.62.0+dfsg-5
ii  libboost-regex1.62.0            1.62.0+dfsg-5
ii  libboost-signals1.62.0          1.62.0+dfsg-5
ii  libboost-system1.62.0           1.62.0+dfsg-5
ii  libboost-thread1.62.0           1.62.0+dfsg-5
ii  libc6                           2.26-6
ii  libcoin80v5                     3.1.4~abc9f50+dfsg3-2
ii  libfreeimage3                   3.17.0+ds1-5+b3
ii  libfreetype6                    2.8.1-2
ii  libgcc1                         1:8-20180218-1
ii  libgl1                          1.0.0-2
ii  libglu1-mesa [libglu1]          9.0.0-2.1
ii  liboce-foundation11             0.18.2-2
ii  liboce-modeling11               0.18.2-2
ii  liboce-ocaf-lite11              0.18.2-2
ii  liboce-ocaf11                   0.18.2-2
ii  liboce-visualization11          0.18.2-2
ii  libpyside1.2                    1.2.2+source1-3
ii  libpython2.7                    2.7.14-6
ii  libqt4-network                  4:4.8.7+dfsg-11
ii  libqt4-opengl                   4:4.8.7+dfsg-11
ii  libqt4-svg                      4:4.8.7+dfsg-11
ii  libqt4-xml                      4:4.8.7+dfsg-11
ii  libqtcore4                      4:4.8.7+dfsg-11
ii  libqtgui4                       4:4.8.7+dfsg-11
ii  libshiboken1.2v5                1.2.2-5+b1
ii  libsoqt4-20                     1.6.0~e8310f-4
ii  libspnav0                       0.2.3-1
ii  libstdc++6                      8-20180218-1
ii  libx11-6                        2:1.6.4-3
ii  libxerces-c3.2                  3.2.0+debian-2
ii  libxext6                        2:1.3.3-1+b2
ii  libzipios++0v5                  0.1.5.9+cvs.2007.04.28-10
ii  pyside-tools                    0.2.15-1+b1
ii  python                          2.7.14-4
ii  python-collada                  0.4-2
ii  python-matplotlib               2.1.1-2
ii  python-pivy                     0.5.0~v609hg-4
ii  python-ply                      3.9-1
ii  python-pyside                   1.2.2+source1-3
ii  python2.7                       2.7.14-6
ii  zlib1g                          1:1.2.8.dfsg-5

freecad recommends no packages.

Versions of packages freecad suggests:
pn  graphviz  <none>
ii  povray    1:3.7.0.4-2+b1

-- no debconf information