[djberge@imperator ~/programming/ruby/extensions/admin]$ gdb ruby
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(gdb) run test.rb
Starting program: /usr/local/bin/ruby test.rb

Program received signal SIGSEGV, Segmentation fault.
0x2821fc23 in open () from /lib/libc.so.7
(gdb) bt
#0  0x2821fc23 in open () from /lib/libc.so.7
#1  0x2823f458 in __sF () from /lib/libc.so.7
#2  0x00000000 in ?? ()
#3  0x00000000 in ?? ()
#4  0x00000000 in ?? ()
#5  0x00000000 in ?? ()
#6  0x00000000 in ?? ()
#7  0x00000000 in ?? ()
#8  0x00000000 in ?? ()
#9  0x00000000 in ?? ()
#10 0x00000000 in ?? ()
#11 0x00000000 in ?? ()
#12 0x00000063 in ?? ()
#13 0x63000000 in ?? ()
#14 0x080f1ce8 in __isthreaded@@FBSD_1.0 ()
#15 0x2823a448 in sys_nerr () from /lib/libc.so.7
#16 0x2823f7f8 in ?? () from /lib/libc.so.7
#17 0x2837705c in ?? ()
#18 0x28377034 in ?? ()
#19 0xbfbfddb8 in ?? ()
#20 0x28206708 in gethostbyaddr () from /lib/libc.so.7
#21 0x2822304f in vfprintf () from /lib/libc.so.7
#22 0x2820dbe3 in printf () from /lib/libc.so.7
#23 0x282559f8 in admin_users_body (klass=674379060) at admin.c:23
#24 0x080544c9 in rb_ensure (b_proc=0x28255990 <admin_users_body>, data1=674379060,
    e_proc=0x28255960 <admin_users_cleanup>, data2=4) at eval.c:5488
#25 0x28255959 in admin_users (klass=674379140) at admin.c:35
#26 0x0805e67a in rb_call0 (klass=674379120, recv=674379140, id=10145, oid=10145, argc=0, argv=0x0,
    body=0x2832355c, flags=0) at eval.c:5847
#27 0x0805e931 in rb_call (klass=674379120, recv=674379140, mid=10145, argc=0, argv=0x0, scope=0,
    self=674441620) at eval.c:6094
#28 0x0805a6f9 in rb_eval (self=674441620, n=Variable "n" is not available.
) at eval.c:3473
#29 0x080691f7 in ruby_exec_internal () at eval.c:1634
#30 0x08069226 in ruby_exec () at eval.c:1654
---Type <return> to continue, or q <return> to quit---
#31 0x08069250 in ruby_run () at eval.c:1664
#32 0x080528cf in main (argc=672265728, argv=0x28118734, envp=0x28123120) at main.c:48