Description of problem:
Booted the F24 Alpha 1.5 KDE x86_64 live image. I then went into System Settings and fiddled with the video settings a bit. I'm not sure precisely where along the line this crash happened - it had no obviously visible result, I just noticed the entry for it when I went into abrt.

Version-Release number of selected component:
plasma-workspace-5.5.5-4.fc24

Additional info:
reporter:       libreport-2.6.4
backtrace_rating: 4
cmdline:        ksplashqml Breeze --pid
crash_function: pthread_barrier_destroy
executable:     /usr/bin/ksplashqml
global_pid:     1511
kernel:         4.5.0-0.rc7.git0.2.fc24.x86_64
runlevel:       unknown
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 pthread_barrier_destroy at pthread_barrier_destroy.c:40
 #1 pipe_barrier_destroy at ../../../../src/gallium/auxiliary/os/os_thread.h:155
 #2 lp_rast_destroy at lp_rast.c:970
 #3 llvmpipe_destroy_screen at lp_screen.c:528
 #4 dri_destroy_screen_helper at dri_screen.c:380
 #5 dri_destroy_screen at dri_screen.c:391
 #6 driDestroyScreen at dri_util.c:228
 #7 driswDestroyScreen at drisw_glx.c:587
 #8 FreeScreenConfigs at glxext.c:217
 #9 glx_display_free at glxext.c:240