Version-Release number of selected component:
xfdesktop-4.12.3-3.fc24

Additional info:
reporter:       libreport-2.8.0
backtrace_rating: 4
cmdline:        xfdesktop
crash_function: XGetXCBConnection
executable:     /usr/bin/xfdesktop
global_pid:     30985
kernel:         4.9.8-201.fc25.x86_64
pkg_fingerprint: 73BD E983 81B4 6521
pkg_vendor:     Fedora Project
runlevel:       N 5
type:           CCpp
uid:            6105

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 XGetXCBConnection at x11_xcb.c:9
 #1 sn_display_new at sn-common.c:77
 #2 wnck_screen_construct at screen.c:594
 #3 wnck_screen_get at screen.c:650
 #4 xfce_desktop_realize at xfce-desktop.c:1073
 #9 gtk_widget_realize at gtkwidget.c:3561
 #10 xfdesktop_application_start at xfdesktop-application.c:742
 #11 cb_wait_for_window_manager_destroyed at xfdesktop-application.c:630
 #12 g_source_callback_unref at gmain.c:1547
 #13 g_source_destroy_internal at gmain.c:1236