pipes@elysium-v210:~$ gdb -c core `which silc`
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "sparc-linux-gnu"...

warning: .dynamic section for "/lib/libncurses.so.5" is not at the expected address (wrong library or version mismatch?)
Reading symbols from /usr/lib/libsilcclient-1.1.so.2...Reading symbols from /usr/lib/debug/usr/lib/libsilcclient-1.1.so.2.0.1...done.
done.
Loaded symbols for /usr/lib/libsilcclient-1.1.so.2
Reading symbols from /usr/lib/libsilc-1.1.so.2...Reading symbols from /usr/lib/debug/usr/lib/libsilc-1.1.so.2.1.0...done.
done.
Loaded symbols for /usr/lib/libsilc-1.1.so.2
Reading symbols from /usr/lib/libperl.so.5.10...done.
Loaded symbols for /usr/lib/libperl.so.5.10
Reading symbols from /lib/ultra3/libm.so.6...done.
Loaded symbols for /lib/ultra3/libm.so.6
Reading symbols from /lib/ultra3/libpthread.so.0...done.
Loaded symbols for /lib/ultra3/libpthread.so.0
Reading symbols from /lib/ultra3/libcrypt.so.1...done.
Loaded symbols for /lib/ultra3/libcrypt.so.1
Reading symbols from /usr/lib/libgmodule-2.0.so.0...done.
Loaded symbols for /usr/lib/libgmodule-2.0.so.0
Reading symbols from /lib/ultra3/libdl.so.2...done.
Loaded symbols for /lib/ultra3/libdl.so.2
Reading symbols from /usr/lib/libglib-2.0.so.0...done.
Loaded symbols for /usr/lib/libglib-2.0.so.0
Reading symbols from /lib/libncurses.so.5...done.
Loaded symbols for /lib/libncurses.so.5
Reading symbols from /lib/ultra3/libc.so.6...done.
Loaded symbols for /lib/ultra3/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/libselinux.so.1...done.
Loaded symbols for /lib/libselinux.so.1
Reading symbols from /usr/lib/libpcre.so.3...done.
Loaded symbols for /usr/lib/libpcre.so.3
Reading symbols from /lib/ultra3/libnss_compat.so.2...done.
Loaded symbols for /lib/ultra3/libnss_compat.so.2
Reading symbols from /lib/ultra3/libnsl.so.1...done.
Loaded symbols for /lib/ultra3/libnsl.so.1
Reading symbols from /lib/ultra3/libnss_nis.so.2...done.
Loaded symbols for /lib/ultra3/libnss_nis.so.2
Reading symbols from /lib/ultra3/libnss_files.so.2...done.
Loaded symbols for /lib/ultra3/libnss_files.so.2
Reading symbols from /usr/lib/gconv/CP1252.so...done.
Loaded symbols for /usr/lib/gconv/CP1252.so
Reading symbols from /lib/ultra3/libnss_dns.so.2...done.
Loaded symbols for /lib/ultra3/libnss_dns.so.2
Reading symbols from /lib/ultra3/libresolv.so.2...done.
Loaded symbols for /lib/ultra3/libresolv.so.2
Core was generated by `silc'.
Program terminated with signal 6, Aborted.
[New process 19324]
#0  0xf78e146c in raise () from /lib/ultra3/libc.so.6
(gdb) bt
#0  0xf78e146c in raise () from /lib/ultra3/libc.so.6
#1  0xf78e3258 in abort () from /lib/ultra3/libc.so.6
#2  0xf78d8494 in __assert_fail () from /lib/ultra3/libc.so.6
#3  0xf7ea1c7c in silc_mutex_lock (mutex=0x16ad30) at silcunixthread.c:147
#4  0xf7f66664 in silc_client_unref_client (client=0xe7078, conn=0x156c90, client_entry=0x1cb838) at /build/buildd/silc-toolkit-1.1.7/lib/silcutil/silcatomic.h:621
#5  0xf7f71fdc in silc_client_notify_signoff (fsm=0x16a560, fsm_context=0x156c90, state_context=<value optimized out>) at client_notify.c:550
#6  0xf7f7468c in silc_client_notify (fsm=0x16a560, fsm_context=0x156c90, state_context=0x263af0) at client_notify.c:232
#7  0xf7f638b4 in silc_client_connection_st_packet (fsm=0x16a560, fsm_context=0x156c90, state_context=0x263af0) at client.c:382
#8  0xf7eb1e84 in silc_fsm_run (schedule=0x153968, app_context=0xe7078, type=0, fd=0, context=0x16a560) at silcfsm.c:429
#9  0xf7eb24f8 in silc_fsm_start_sync (fsm=0x16a560, start_state=0xf7f63668 <silc_client_connection_st_packet>) at silcfsm.c:249
#10 0xf7f6255c in silc_client_packet_receive (engine=<value optimized out>, stream=0x157330, packet=0x263af0, callback_context=0xe7078, stream_context=0x156c90) at client.c:120
#11 0xf7e93a90 in silc_packet_dispatch (packet=0x263af0) at silcpacket.c:2007
#12 0xf7e98c04 in silc_packet_read_process (stream=0x157330) at silcpacket.c:2318
#13 0xf7e99e34 in silc_packet_stream_io (stream=0x156380, status=<value optimized out>, context=0x157330) at silcpacket.c:438
#14 0xf7ea0ffc in silc_socket_stream_io (schedule=0x153968, app_context=0xe7078, type=SILC_TASK_READ, fd=3, context=0x156380) at silcunixsocketstream.c:36
#15 0xf7ea88c8 in silc_schedule_dispatch_fd (schedule=0x153968) at silcschedule.c:61
#16 0xf7eaa6b4 in silc_schedule_iterate (schedule=0x153968, timeout_usecs=0) at silcschedule.c:455
#17 0xf7eaa82c in silc_schedule_one (schedule=0x153968, timeout_usecs=0) at silcschedule.c:484
#18 0xf7f6231c in silc_client_run_one (client=0xe7078) at client.c:1093
#19 0x00066aa4 in my_silc_scheduler_fd (source=<value optimized out>, condition=G_IO_IN, data=0x3) at silc-core.c:91
#20 0xf7afd128 in ?? () from /usr/lib/libglib-2.0.so.0
#21 0xf7afd128 in ?? () from /usr/lib/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) i r
g0             0x0	0
g1             0xd3	211
g2             0x0	0
g3             0xf7f56910	-134911728
g4             0xf86bfcaa	-127140694
g5             0x11	17
g6             0xffffffff	-1
g7             0xf7f56910	-134911728
o0             0x0	0
o1             0x4b7c	19324
o2             0x6	6
o3             0x8	8
o4             0x0	0
o5             0x4b7c	19324
sp             0xffa0c3d0	0xffa0c3d0
o7             0xf7f56910	-134911728
l0             0x0	0
l1             0x226f68	2256744
l2             0x2a	42
l3             0x8000	32768
l4             0x0	0
l5             0xf7a35670	-140290448
l6             0xf7a3566c	-140290452
l7             0xf7a33000	-140300288
i0             0x6	6
i1             0xffa0c530	-6240976
i2             0x0	0
i3             0x1	1
i4             0x1	1
i5             0xf7a34b68	-140293272
fp             0xffa0c440	0xffa0c440
i7             0xf78e3250	-141675952
y              0x0	0
psr            0xff000084	[ #2 S #24 #25 #26 #27 #28 #29 #30 #31 ]
wim            0x0	0
tbr            0x0	0
pc             0xf78e146c	0xf78e146c <raise+76>
npc            0xf78e1470	0xf78e1470 <raise+80>
fsr            0x420	[ NXC #10 ]
csr            0x0	0