Created attachment 137109 [details]
backtrace kwin alt-tab thumbnails AMDGPU

Kwin segfaults when alt-tabbing with "thumbnails" selected. I wanted to file a
bug report against AMDGPU driver, but search shows exactly the same problem
with radeonsi, so I'm adding to this bug report. If you think I should open a
new bug against AMDGPU, let me know please.

AMD Rx560 using AMDGPU with DC=1 on linux 4.15.0
Xorg: 1.19.6+13+gd0d1a694f-1
xf86-video-amdgpu: 1.4.0-1
kwin: 5.11.95-1
mesa: 17.3.3-2

Filed a bug with KDE: https://bugs.kde.org/show_bug.cgi?id=389593
They told me it's a driver crash and sent me here.