(pan:31034): Gdk-WARNING **: GdkWindow 0x320008a unexpectedly destroyed

(pan:31034): Gdk-WARNING **: GdkWindow 0x3200089 unexpectedly destroyed

(pan:31034): Gdk-WARNING **: GdkWindow 0x3200088 unexpectedly destroyed

(pan:31034): Gdk-WARNING **: GdkWindow 0x3200087 unexpectedly destroyed

(pan:31034): Gdk-WARNING **: GdkWindow 0x3200068 unexpectedly destroyed

Gdk-ERROR **: The program 'pan' received an X Window System error.
This probably reflects a bug in the program.
The error was '187'.
  (Details: serial 612244 error_code 187 request_code 156 minor_code 7)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
aborting...
Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 1024 (LWP 31034)]
0x403b3a41 in g_logv (log_domain=0x402a226d "Gdk", 
    log_level=G_LOG_LEVEL_ERROR, format=0x402a25ce "%s", args1=0xbffff840)
    at gmessages.c:503
503                     G_BREAKPOINT ();
(gdb) bt
#0  0x403b3a41 in g_logv (log_domain=0x402a226d "Gdk", 
    log_level=G_LOG_LEVEL_ERROR, format=0x402a25ce "%s", args1=0xbffff840)
    at gmessages.c:503
#1  0x403b3af9 in g_log (log_domain=0x402a226d "Gdk", 
    log_level=G_LOG_LEVEL_ERROR, format=0x402a25ce "%s") at gmessages.c:526
#2  0x4028a9f5 in gdk_x_error (display=0x8149780, error=0xbffff8cc)
    at gdkmain-x11.c:780
#3  0x406469cd in _XError () from /usr/X11R6/lib/libX11.so.6
#4  0x4064507b in _XReply () from /usr/X11R6/lib/libX11.so.6
#5  0x40640a77 in XSync () from /usr/X11R6/lib/libX11.so.6
#6  0x40281ed9 in gdk_flush () at gdkevents-x11.c:1879
#7  0x400eb820 in gtk_main () at gtkmain.c:914
#8  0x080755dd in main (argc=1, argv=0xbffffaa4) at pan.c:233
(gdb) info threads
  3 Thread 1026 (LWP 31036)  0x40558df1 in nanosleep () from /lib/libc.so.6
  2 Thread 2049 (LWP 31035)  0x40580bc0 in poll () from /lib/libc.so.6
* 1 Thread 1024 (LWP 31034)  0x403b3a41 in g_logv (
    log_domain=0x402a226d "Gdk", log_level=G_LOG_LEVEL_ERROR, 
    format=0x402a25ce "%s", args1=0xbffff840) at gmessages.c:503
(gdb) thread 1
[Switching to thread 1 (Thread 1024 (LWP 31034))]#0  0x403b3a41 in g_logv (
    log_domain=0x402a226d "Gdk", log_level=G_LOG_LEVEL_ERROR, 
    format=0x402a25ce "%s", args1=0xbffff840) at gmessages.c:503
503                     G_BREAKPOINT ();
(gdb) bt
#0  0x403b3a41 in g_logv (log_domain=0x402a226d "Gdk", 
    log_level=G_LOG_LEVEL_ERROR, format=0x402a25ce "%s", args1=0xbffff840)
    at gmessages.c:503
#1  0x403b3af9 in g_log (log_domain=0x402a226d "Gdk", 
    log_level=G_LOG_LEVEL_ERROR, format=0x402a25ce "%s") at gmessages.c:526
#2  0x4028a9f5 in gdk_x_error (display=0x8149780, error=0xbffff8cc)
    at gdkmain-x11.c:780
#3  0x406469cd in _XError () from /usr/X11R6/lib/libX11.so.6
#4  0x4064507b in _XReply () from /usr/X11R6/lib/libX11.so.6
#5  0x40640a77 in XSync () from /usr/X11R6/lib/libX11.so.6
#6  0x40281ed9 in gdk_flush () at gdkevents-x11.c:1879
#7  0x400eb820 in gtk_main () at gtkmain.c:914
#8  0x080755dd in main (argc=1, argv=0xbffffaa4) at pan.c:233
(gdb) thread 3
[Switching to thread 3 (Thread 1026 (LWP 31036))]#0  0x40558df1 in nanosleep ()
   from /lib/libc.so.6
(gdb) bt
#0  0x40558df1 in nanosleep () from /lib/libc.so.6
#1  0x404accda in __pthread_timedsuspend_new () from /lib/libpthread.so.0
#2  0x404a935b in pthread_cond_timedwait_relative () from /lib/libpthread.so.0
#3  0x404a94ec in pthread_cond_timedwait () from /lib/libpthread.so.0
#4  0x404a080b in g_cond_timed_wait_posix_impl (cond=0x81a1c70, 
    entered_mutex=0x81a1c30, abs_time=0xbf7ffaac) at gthread-posix.c:208
#5  0x08080c38 in queue_mainloop (unused=0x0) at queue.c:1238
#6  0x403c1d70 in g_thread_create_proxy (data=0x81a1cd8) at gthread.c:538
#7  0x404aa0ba in pthread_start_thread () from /lib/libpthread.so.0
#8  0x404aa101 in pthread_start_thread_event () from /lib/libpthread.so.0