Created attachment 123145 [details]
backtrace

SUMMARY
kwin_wayland crashes immediately after I run it from the command line.

STEPS TO REPRODUCE
1. run 'kwin_wayland' with no arguments in a terminal.

OBSERVED RESULT
Segmentation fault with the backtrace attached.

EXPECTED RESULT
Successful startup without a segmentation fault.

SOFTWARE/OS VERSION
Operating System: Fedora 30
KDE Plasma Version: 5.15.5
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.4
Kernel Version: 5.2.7-200.fc30.x86_64
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-4300M CPU @ 2.60GHz
Memory: 7.7 GiB of RAM

ADDITIONAL INFORMATION
> rpm -qa name *wayland* | sort
kf5-kwayland-5.59.0-2.fc30.x86_64
kwayland-integration-5.15.5-1.fc30.x86_64
kwayland-integration-debuginfo-5.15.5-1.fc30.x86_64
kwayland-integration-debugsource-5.15.5-1.fc30.x86_64
kwin-wayland-5.15.5-2.fc30.x86_64
kwin-wayland-debuginfo-5.15.5-2.fc30.x86_64
libwayland-client-1.17.0-1.fc30.i686
libwayland-client-1.17.0-1.fc30.x86_64
libwayland-cursor-1.17.0-1.fc30.i686
libwayland-cursor-1.17.0-1.fc30.x86_64
libwayland-egl-1.17.0-1.fc30.i686
libwayland-egl-1.17.0-1.fc30.x86_64
libwayland-server-1.17.0-1.fc30.i686
libwayland-server-1.17.0-1.fc30.x86_64
qt5-qtwayland-5.12.4-7.fc30.x86_64
qt5-qtwayland-devel-5.12.4-7.fc30.x86_64
xorg-x11-server-Xwayland-1.20.5-7.fc30.x86_64

> rpm -qa name *kwin* | sort
kf5-kwindowsystem-5.59.0-1.fc30.x86_64
kwin-5.15.5-2.fc30.x86_64
kwin-common-5.15.5-2.fc30.x86_64
kwin-common-debuginfo-5.15.5-2.fc30.x86_64
kwin-debuginfo-5.15.5-2.fc30.x86_64
kwin-debugsource-5.15.5-2.fc30.x86_64
kwin-libs-5.15.5-2.fc30.x86_64
kwin-libs-debuginfo-5.15.5-2.fc30.x86_64
kwin-wayland-5.15.5-2.fc30.x86_64
kwin-wayland-debuginfo-5.15.5-2.fc30.x86_64