segfault caused by glib/gtk?

[Thijs Assies <thijs_a gmx net>]

hi!

my program suddenly chrashes, while trying to figure out where, i found 
this:

GLib-ERROR **: file gmain.c: line 1633 (g_main_dispatch): assertion 
failed: (source->context == context)
aborting...

Program received signal SIGABRT, Aborted.
[Switching to Thread 16384 (LWP 18295)]
0x40846911 in kill () from /lib/libc.so.6
(gdb) backtrace
#0  0x40846911 in kill () from /lib/libc.so.6
#1  0x4077624b in pthread_kill () from /lib/libpthread.so.0
#2  0x40776521 in raise () from /lib/libpthread.so.0
#3  0x40847846 in abort () from /lib/libc.so.6
#4  0x407e3970 in g_logv (log_domain=0x407ffc8d "GLib", 
log_level=G_LOG_LEVEL_ERROR,
   format=0x408000a0 "file %s: line %d (%s): assertion failed: (%s)", 
args1=0xbffff91c) at gmessages.c:507
#5  0x407e3a1d in g_log (log_domain=0x407ffc8d "GLib", 
log_level=G_LOG_LEVEL_ERROR,
   format=0x408000a0 "file %s: line %d (%s): assertion failed: (%s)") 
at gmessages.c:526
#6  0x407dc890 in g_main_dispatch (context=0x805fd50) at gmain.c:1633
#7  0x407dd5f7 in g_main_context_dispatch (context=0x805fd50) at 
gmain.c:2161
#8  0x407dd9d3 in g_main_context_iterate (context=0x805fd50, block=1, 
dispatch=1, self=0x8051ac8) at gmain.c:2242
#9  0x407de0af in g_main_loop_run (loop=0x814ab50) at gmain.c:2462
#10 0x4026734f in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#11 0x0804d274 in main (argc=1, argv=0xbffffaf4) at got_topics.c:42


i cont find wich line of my code causes this error! (line 42 of 
got_topic.c = gtk_main(); )
how can i find out?