gdb backtrace

gistfile1.txt

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7aad9c8 in st_lookup (table=0x7ffff7b02c70 <env_free>, key=key@entry=6016, 
    value=value@entry=0x7fffffffd210) at st.c:341
341	st.c: No such file or directory.
(gdb) backtrace
#0  0x00007ffff7aad9c8 in st_lookup (table=0x7ffff7b02c70 <env_free>, key=key@entry=6016, 
    value=value@entry=0x7fffffffd210) at st.c:341
#1  0x00007ffff7b05bb7 in search_method (id=6016, klass=26081240) at vm_method.c:374
#2  rb_method_entry_get_without_cache (id=6016, klass=26081240) at vm_method.c:393
#3  rb_method_entry (klass=26081240, id=6016) at vm_method.c:426
#4  0x00007ffff7b107ae in rb_call0 (self=6, scope=CALL_FCALL, argv=0x0, argc=0, mid=6016, recv=26081200)
    at vm_eval.c:228
#5  rb_call (scope=CALL_FCALL, argv=0x0, argc=0, mid=6016, recv=26081200) at vm_eval.c:456
#6  rb_funcall (recv=26081200, mid=6016, n=0) at vm_eval.c:658
#7  0x00007ffff4af9977 in operator() (this=0x1431da8) at /usr/include/c++/4.7/tr1/functional:2153
#8  Gosu::RunGLFunctor::operator() (this=0x1431da0) at ../GosuImpl/Graphics/Graphics.cpp:179
#9  0x00007ffff4b046ff in operator() (this=<optimized out>) at /usr/include/c++/4.7/tr1/functional:2153
#10 Gosu::DrawOpQueue::performDrawOpsAndCode (this=0x11e30a0) at ../GosuImpl/Graphics/DrawOpQueue.hpp:132
#11 0x00007ffff4af774f in Gosu::Graphics::flush (this=this@entry=0x11e46b0) at ../GosuImpl/Graphics/Graphics.cpp:115
#12 0x00007ffff4af7a76 in Gosu::Graphics::end (this=0x11e46b0) at ../GosuImpl/Graphics/Graphics.cpp:105
#13 0x00007ffff4b12920 in doTick (window=0x13f2d50, this=0x10003d0) at ../GosuImpl/WindowX.cpp:199
#14 Gosu::Window::show (this=0x13f2d50) at ../GosuImpl/WindowX.cpp:379
#15 0x00007ffff4ad98f5 in _wrap_Window_show (argc=<optimized out>, argv=<optimized out>, self=9400480)
    at ../GosuImpl/RubyGosu_wrap.cxx:8751
#16 0x00007ffff7b11a7c in vm_call_cfunc (me=0xe3a520, blockptr=<optimized out>, recv=<optimized out>, num=0, 
    reg_cfp=0x7ffff7fcbeb0, th=0x603520) at vm_insnhelper.c:404
#17 vm_call_method (th=th@entry=0x603520, cfp=cfp@entry=0x7ffff7fcbeb0, num=0, blockptr=<optimized out>, 
    flag=<optimized out>, flag@entry=24, id=<optimized out>, me=0xe3a520, recv=9400480) at vm_insnhelper.c:530
#18 0x00007ffff7b0970b in vm_exec_core (th=0x603520, initial=initial@entry=0) at insns.def:1018
#19 0x00007ffff7b0df69 in vm_exec (th=th@entry=0x603520) at vm.c:1236
#20 0x00007ffff7b1391d in rb_iseq_eval_main (iseqval=iseqval@entry=8824720) at vm.c:1478
#21 0x00007ffff79f0e3a in ruby_exec_internal (n=0x86a790) at eval.c:204
#22 0x00007ffff79f1d3d in ruby_exec_node (n=n@entry=0x86a790) at eval.c:251
#23 0x00007ffff79f3cfc in ruby_run_node (n=0x86a790) at eval.c:244
#24 0x00000000004008ab in main (argc=3, argv=0x7fffffffdd58) at main.c:38