0xb7d72164 in pthread_getconcurrency () from /lib/i686/libpthread.so.0
(gdb) backtrace
#0  0xb7d72164 in pthread_getconcurrency () from /lib/i686/libpthread.so.0
#1  0xb7d71b38 in pthread_getconcurrency () from /lib/i686/libpthread.so.0
#2  0xb7d7113e in pthread_create () from /lib/i686/libpthread.so.0
#3  0x0827881b in rb_thread_create_timer_thread () at /home/svn/ruby/branches/ruby_1_9_1/thread_pthread.c:793
#4  0x081c33c5 in rb_call_inits () at /home/svn/ruby/branches/ruby_1_9_1/inits.c:57
#5  0x081afa8a in ruby_init () at /home/svn/ruby/branches/ruby_1_9_1/eval.c:66
#6  0x08194123 in ensure_ruby_initialized () at if_ruby.c:432
#7  0x0819498d in ex_ruby (eap=0xbfcb895c) at if_ruby.c:343
#8  0x080bb54d in do_one_cmd (cmdlinep=0xbfcb8db8, sourcing=0, cstack=0xbfcb8a5c, fgetline=0x80c93a0 <getexline>, cookie=0x0)
    at ex_docmd.c:2621
#9  0x080bc600 in do_cmdline (cmdline=0x0, getline=0x80c93a0 <getexline>, cookie=0x0, flags=<value optimized out>) at ex_docmd.c:1095
#10 0x0811d69f in nv_colon (cap=0xbfcb8e38) at normal.c:5214
#11 0x0811ff9b in normal_cmd (oap=0xbfcb8e9c, toplevel=1) at normal.c:1181
#12 0x080e9f23 in main_loop (cmdwin=0, noexmode=0) at main.c:1179
#13 0x080eb8f4 in main (argc=Cannot access memory at address 0x8
) at main.c:938
(gdb)