mz@webdev07:~$ gdb perl 
GNU gdb 6.6-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) set args  cat/Blog/script/blog_server.pl -r -d -f 
(gdb) run
Starting program: /usr/local/bin/perl cat/Blog/script/blog_server.pl -r -d -f 
[Thread debugging using libthread_db enabled]
[New Thread -1210791232 (LWP 7134)]
Error while reading shared library symbols:
Cannot find new threads: generic error
v-string in use/require non-portable at /home/mz/perl/lib/site_perl/5.9.5/Tree/S
imple.pm line 4.
Useless localization of subroutine entry at /home/mz/perl/lib/site_perl/5.9.5/Ca
talyst/Action.pm line 41.

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1210791232 (LWP 7134)]
0xb7e8b163 in ?? () from /lib/tls/i686/cmov/libc.so.6
(gdb) bt
#0  0xb7e8b163 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1  0xbfe1d9a8 in ?? ()
#2  0xffffffff in ?? ()
#3  0x00000000 in ?? ()
(gdb)