.
Thread 1 (Thread 3442):
#0  0x00007f0ce5c2d4b5 in raise () from /lib/libc.so.6
#1  0x00007f0ce5c30f50 in abort () from /lib/libc.so.6
#2  0x00000000004072c0 in dump_core_on_signal ()
#3  <signal handler called>
#4  0x00007f0ce61b0590 in XPutImage () from /usr/lib/libX11.so.6
#5  0x000000000040ee7a in tray_update_bg ()
#6  0x000000000040f5ca in tray_create_window ()
#7  0x0000000000406874 in main ()