Description of problem:
installing new printer

Version-Release number of selected component:
system-config-printer-1.4.6-1.fc20

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        /usr/bin/python /usr/share/system-config-printer/system-config-printer.py
crash_function: dequeue_pending_request
executable:     /usr/bin/python2.7
kernel:         3.16.7-200.fc20.i686+PAE
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #5 dequeue_pending_request at xcb_io.c:185
 #7 XGetWindowProperty at GetProp.c:69
 #8 gdk_check_wm_desktop_changed at gdkdisplay-x11.c:316
 #9 gdk_x11_display_translate_event at gdkdisplay-x11.c:888
 #10 _gdk_x11_event_translator_translate at gdkeventtranslator.c:51
 #11 gdk_event_source_translate_event at gdkeventsource.c:240
 #12 _gdk_x11_display_queue_events at gdkeventsource.c:338
 #13 gdk_display_get_event at gdkdisplay.c:327
 #19 gtk_main at gtkmain.c:1158
 #20 ffi_call_SYSV at ../src/x86/sysv.S:65