Description of problem:
I installed Fedora 22 using "minimal install" and then I installed plasma-desktop, sddm and a few more packages (I did not use the group "KDE Plasma Workspace"). I verified I can log in to Plasma and I upgraded to Rawhide. I rebooted my system and when I tried to log in to Plasma kwin started crashing (I confiugred KDE_DEBUG=1 to be able to report the crash via abrt). Could the crash be caused by a missing weak dependency?

Version-Release number of selected component:
kwin-5.3.1-2.fc23

Additional info:
reporter:       libreport-2.5.1.34.g4907
backtrace_rating: 4
cmdline:        /usr/bin/kwin_x11 --crashes 4
crash_function: KCrash::defaultCrashHandler
executable:     /usr/bin/kwin_x11
global_pid:     4596
kernel:         4.1.0-0.rc6.git1.1.fc23.x86_64
runlevel:       3 5
type:           CCpp
uid:            18601

Truncated backtrace:
Thread no. 1 (10 frames)
 #1 KCrash::defaultCrashHandler at ../../src/kcrash.cpp:409
 #3 xcb_setup_vendor_end at xproto.c:869
 #4 xcb_setup_pixmap_formats at xproto.c:878
 #5 find_format_by_depth at xcb_image.c:46
 #6 xcb_image_native at xcb_image.c:388
 #7 xcb_image_shm_put at xcb_image.c:484
 #8 QXcbShmImage::put at qxcbbackingstore.cpp:189
 #9 QXcbBackingStore::flush at qxcbbackingstore.cpp:324
 #10 QBackingStore::flush at painting/qbackingstore.cpp:105
 #11 QWidgetBackingStore::qt_flush at kernel/qwidgetbackingstore.cpp:118