https://bugs.kde.org/show_bug.cgi?id=389201
--- Comment #2 from Roland Hautz <rha...@kabelmail.de> --- Created attachment 111379 --> https://bugs.kde.org/attachment.cgi?id=111379&action=edit New crash information added by DrKonqi kwin_x11 (5.12.3) using Qt 5.9.4 - What I was doing when the application crashed: Alt-Tab shortly after one window terminated normally -- Backtrace (Reduced): #7 0x00007ffff7406dbd in KWin::Workspace::constrainedStackingOrder() () from /usr/lib64/libkwin.so.5 #8 0x00007ffff74075d0 in KWin::Workspace::updateStackingOrder(bool) () from /usr/lib64/libkwin.so.5 #9 0x00007ffff74078e0 in KWin::Workspace::blockStackingUpdates(bool) () from /usr/lib64/libkwin.so.5 #10 0x00007ffff73b04cd in KWin::Client::destroyClient() () from /usr/lib64/libkwin.so.5 #11 0x00007ffff7413286 in KWin::Client::unmapNotifyEvent(xcb_unmap_notify_event_t*) () from /usr/lib64/libkwin.so.5 -- You are receiving this mail because: You are watching all bug changes.