Description of problem:
This happened when starting Exaile up; I think I saw the library window appear and then it died.
Restarting it and it's fine and I've not seen it before, so I don't have a  way to reproduce it.
I don't see anything relevant in .local/share/exaile/logs/exaile.log.1  - it just seems to have been early into
the 'Scanning library' phase listing out titles and hadn't got far.

Version-Release number of selected component:
exaile-3.4.3-1.fc21

Additional info:
reporter:       libreport-2.3.0
backtrace_rating: 4
cmdline:        /usr/bin/python2 /usr/share/exaile/exaile.py --datadir=/usr/share/exaile/data --startgui
crash_function: miUnionO
executable:     /usr/bin/python2.7
kernel:         3.18.6-200.fc21.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #4 miUnionO at gdkregion-generic.c:1189
 #5 miRegionOp at gdkregion-generic.c:983
 #6 gdk_region_union at gdkregion-generic.c:1266
 #7 gdk_window_invalidate_maybe_recurse_full at gdkwindow.c:6000
 #8 gtk_widget_size_allocate at gtkwidget.c:4133
 #9 gtk_box_size_allocate at gtkbox.c:500
 #14 gtk_widget_size_allocate at gtkwidget.c:4122
 #15 gtk_box_size_allocate at gtkbox.c:500
 #20 gtk_widget_size_allocate at gtkwidget.c:4122
 #21 gtk_paned_size_allocate at gtkpaned.c:947