Comment # 12 on bug 1141883 from Wolfgang Bauer

Ok, I was able to reproduce the crash in IceWM like this:
- install qtcurve-qt5 and qt5ct
- run qt5ct, set Style to "QtCurve" (on the Appearance tab that should be open
on start) and click OK
- logout/login to "activate" qt5ct (or run "export
QT_QPA_PLATFORMTHEME='qt5ct'" manually)
- run pinentry-qt and enter "BYE"

Should work like this on any other desktop as well, because the "export
QT_QPA_PLATFORMTHEME='qt5ct'" should force Qt5 to use qt5ct regardless of the
desktop session.