Created attachment 114029 [details] Gdb backtrace When using certain windows decoration themes KWin will crash when pressing the close button of any window. How to reproduce: -Start a Plasma Wayland Session -Open System Settings > Application Style > Window Decorations -Select Plastik (included by default), Adapta or Materia and Apply -Click on the close button of the System Setting Window => Crash Links: Gdb backtrace: https://pastebin.com/rKRwjY9a LZ4 Coredump (18.3M): https://mega.nz/#!lh4WnAaR!k5EwMj1FkaPNmYlblEj1wZ-tpon80_49U_JL-cJmF0U
I've experienced the issue both on Arch Linux and Fedora 28 KDE Spin with the latest packages.
Fixed in next Qt *** This bug has been marked as a duplicate of bug 395346 ***