Comment 19 for bug 1754084

$ freecad
FreeCAD 0.16, Libs: 0.16R
© Juergen Riegel, Werner Mayer, Yorik van Havre 2001-2015
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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:263: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
Aborted (core dumped)

$ ./FreeCAD-0.17.13541.9948ee4.glibc2.17-x86_64.AppImage
FreeCAD 0.17, Libs: 0.17R13541 (Git)
© Juergen Riegel, Werner Mayer, Yorik van Havre 2001-2018
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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:263: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
Aborted (core dumped)