(gdb) bt
#0  0x28276de3 in select () from /lib/libc.so.7
#1  0x2818ca20 in select () from /lib/libthr.so.3
#2  0x280aff91 in rb_thread_select () from /usr/local/lib/libruby18.so.18
#3  0x280d2468 in rb_f_select () from /usr/local/lib/libruby18.so.18
#4  0x280a8e55 in call_cfunc () from /usr/local/lib/libruby18.so.18
#5  0x280b1922 in rb_call0 () from /usr/local/lib/libruby18.so.18
#6  0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#7  0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#8  0x280b8d73 in rb_eval () from /usr/local/lib/libruby18.so.18
#9  0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#10 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#11 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#12 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#13 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#14 0x280b8b65 in rb_eval () from /usr/local/lib/libruby18.so.18
#15 0x280ba2d7 in rb_eval () from /usr/local/lib/libruby18.so.18
#16 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#17 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#18 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#19 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#20 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#21 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#22 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#23 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#24 0x280b7428 in rb_f_send () from /usr/local/lib/libruby18.so.18
#25 0x280a8e55 in call_cfunc () from /usr/local/lib/libruby18.so.18
#26 0x280b1922 in rb_call0 () from /usr/local/lib/libruby18.so.18
#27 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#28 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#29 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#30 0x280bc6ee in rb_yield_0 () from /usr/local/lib/libruby18.so.18
#31 0x280b7def in rb_eval () from /usr/local/lib/libruby18.so.18
#32 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#33 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#34 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#35 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#36 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#37 0x280baed6 in rb_eval () from /usr/local/lib/libruby18.so.18
#38 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#39 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#40 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#41 0x280b7428 in rb_f_send () from /usr/local/lib/libruby18.so.18
#42 0x280a8e55 in call_cfunc () from /usr/local/lib/libruby18.so.18
#43 0x280b1922 in rb_call0 () from /usr/local/lib/libruby18.so.18
#44 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#45 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#46 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#47 0x280ba2d7 in rb_eval () from /usr/local/lib/libruby18.so.18
#48 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#49 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#50 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#51 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#52 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#53 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#54 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#55 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#56 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#57 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#58 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#59 0x280b8b4c in rb_eval () from /usr/local/lib/libruby18.so.18
#60 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#61 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#62 0x280b2a41 in rb_call_super () from /usr/local/lib/libruby18.so.18
#63 0x280b7c9a in rb_eval () from /usr/local/lib/libruby18.so.18
#64 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#65 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#66 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#67 0x280bc6ee in rb_yield_0 () from /usr/local/lib/libruby18.so.18
#68 0x280b7def in rb_eval () from /usr/local/lib/libruby18.so.18
#69 0x280b8d73 in rb_eval () from /usr/local/lib/libruby18.so.18
#70 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#71 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
---Type <return> to continue, or q <return> to quit---
#72 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#73 0x280baed6 in rb_eval () from /usr/local/lib/libruby18.so.18
#74 0x280b8d73 in rb_eval () from /usr/local/lib/libruby18.so.18
#75 0x280bc6ee in rb_yield_0 () from /usr/local/lib/libruby18.so.18
#76 0x280b7def in rb_eval () from /usr/local/lib/libruby18.so.18
#77 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#78 0x280bc6ee in rb_yield_0 () from /usr/local/lib/libruby18.so.18
#79 0x280bdc59 in rb_yield () from /usr/local/lib/libruby18.so.18
#80 0x280add67 in rb_ensure () from /usr/local/lib/libruby18.so.18
#81 0x282b09ac in rb_mutex_synchronize () from /usr/local/lib/ruby/1.8/i386-freebsd7/thread.so
#82 0x280a8e3d in call_cfunc () from /usr/local/lib/libruby18.so.18
#83 0x280b1922 in rb_call0 () from /usr/local/lib/libruby18.so.18
#84 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#85 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#86 0x280baed6 in rb_eval () from /usr/local/lib/libruby18.so.18
#87 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#88 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#89 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#90 0x280baed6 in rb_eval () from /usr/local/lib/libruby18.so.18
#91 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#92 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#93 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#94 0x280b7d92 in rb_eval () from /usr/local/lib/libruby18.so.18
#95 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#96 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#97 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#98 0x280b8d73 in rb_eval () from /usr/local/lib/libruby18.so.18
#99 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#100 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#101 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#102 0x280b7428 in rb_f_send () from /usr/local/lib/libruby18.so.18
#103 0x280a8e55 in call_cfunc () from /usr/local/lib/libruby18.so.18
#104 0x280b1922 in rb_call0 () from /usr/local/lib/libruby18.so.18
#105 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#106 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#107 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#108 0x280ba2d7 in rb_eval () from /usr/local/lib/libruby18.so.18
#109 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#110 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#111 0x280b7b21 in rb_eval () from /usr/local/lib/libruby18.so.18
#112 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#113 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#114 0x280ba9dc in rb_eval () from /usr/local/lib/libruby18.so.18
#115 0x280b187d in rb_call0 () from /usr/local/lib/libruby18.so.18
#116 0x280b1c00 in rb_call () from /usr/local/lib/libruby18.so.18
#117 0x280b79e1 in rb_eval () from /usr/local/lib/libruby18.so.18
#118 0x280ba807 in rb_eval () from /usr/local/lib/libruby18.so.18
#119 0x280bf5bb in ruby_exec_internal () from /usr/local/lib/libruby18.so.18
#120 0x280bf5fb in ruby_exec () from /usr/local/lib/libruby18.so.18
#121 0x280bf630 in ruby_run () from /usr/local/lib/libruby18.so.18
#122 0x08048a3a in main_entry ()
#123 0x2818a73f in pthread_getprio () from /lib/libthr.so.3
#124 0x00000000 in ?? ()