Comment # 3 on bug 1176023 from Ahmad Samir

More info (sorry about the confusion earlier, I seem to be acting more stupidly
today :)).

I get the crash with:
python3-qtwebengine-qt5-5.13.2-2.6.x86_64 

For completeness's sake (and for future bugzilla/online searches):
Fatal Python error: PyEval_SaveThread: NULL tstate
Python runtime state: initialized

Current thread 0x00007fcb0fd6d740 (most recent call first):
  File "/usr/lib64/calibre/calibre/gui2/webengine.py", line 126 in
_dispatch_messages
  File "/usr/lib64/calibre/calibre/gui2/viewer/main.py", line 239 in main
  File "/usr/lib64/calibre/calibre/gui_launch.py", line 80 in ebook_viewer
  File "/usr/bin/ebook-viewer", line 20 in <module>
Aborted (core dumped)


updating locally to 5.15.* (using the tarball from
https://riverbankcomputing.com/software/pyqtwebengine/download), fixed the
issue.

Also, using the packages from
https://build.opensuse.org/package/binaries/KDE:Qt5/python-qtwebengine-qt5/openSUSE_Factory
fixes the issue. Thanks o/