(gdb) bt
#0  0x00007f4885ebfed5 in raise () from /lib/libc.so.6
#1  0x00007f4885ec13f3 in abort () from /lib/libc.so.6
#2  0x00007f4885efc3a8 in ?? () from /lib/libc.so.6
#3  0x00007f4885f01948 in ?? () from /lib/libc.so.6
#4  0x00007f4885f03a56 in free () from /lib/libc.so.6
#5  0x0000000000444cfd in katze_net_icon_priv_free ()
#6  0x0000000000444eb1 in katze_net_icon_transfer_cb ()
#7  0x00007f4889958e9d in IA__g_closure_invoke (closure=0x2cbbd00, return_value=0x0, n_param_values=1, 
    param_values=0x7fff9225aac0, invocation_hint=0x7fff9225a9c0)
    at /build/buildd/glib2.0-2.16.6/gobject/gclosure.c:490
#8  0x00007f488996bbfd in signal_emit_unlocked_R (node=0x24a3ba0, detail=0, instance=0xe1e820, emission_return=0x0, 
    instance_and_params=0x7fff9225aac0) at /build/buildd/glib2.0-2.16.6/gobject/gsignal.c:2440
#9  0x00007f488996d0ee in IA__g_signal_emit_valist (instance=0xe1e820, signal_id=<value optimized out>, detail=0, 
    var_args=0x7fff9225ad20) at /build/buildd/glib2.0-2.16.6/gobject/gsignal.c:2199
#10 0x00007f488996d5f3 in IA__g_signal_emit (instance=0x71c5, signal_id=29125, detail=6)
    at /build/buildd/glib2.0-2.16.6/gobject/gsignal.c:2243
#11 0x00007f4889e252a3 in ?? () from /usr/lib/libsoup-2.4.so.1
#12 0x00007f4889958e9d in IA__g_closure_invoke (closure=0x26505f0, return_value=0x0, n_param_values=1, 
    param_values=0x7fff9225b080, invocation_hint=0x7fff9225af80)
    at /build/buildd/glib2.0-2.16.6/gobject/gclosure.c:490
#13 0x00007f488996bbfd in signal_emit_unlocked_R (node=0x25f9030, detail=0, instance=0x684c50, emission_return=0x0, 
    instance_and_params=0x7fff9225b080) at /build/buildd/glib2.0-2.16.6/gobject/gsignal.c:2440
#14 0x00007f488996d0ee in IA__g_signal_emit_valist (instance=0x684c50, signal_id=<value optimized out>, detail=0, 
    var_args=0x7fff9225b2e0) at /build/buildd/glib2.0-2.16.6/gobject/gsignal.c:2199
#15 0x00007f488996d5f3 in IA__g_signal_emit (instance=0x71c5, signal_id=29125, detail=6)
    at /build/buildd/glib2.0-2.16.6/gobject/gsignal.c:2243
#16 0x00007f4889e2cd32 in ?? () from /usr/lib/libsoup-2.4.so.1
#17 0x00007f48892bc78b in IA__g_main_context_dispatch (context=0x688110)
    at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2012
#18 0x00007f48892bff5d in g_main_context_iterate (context=0x688110, block=1, dispatch=1, self=<value optimized out>)
    at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2645
#19 0x00007f48892c048d in IA__g_main_loop_run (loop=0x79a220) at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2853
#20 0x00007f48889f2737 in IA__gtk_main () at /scratch/build-area/gtk+2.0-2.12.11/gtk/gtkmain.c:1163
#21 0x00000000004218f4 in main ()