Bottomless Mine GDB Backtrace

Starting program: /usr/bin/ruby Bottomless_Mine.rb
[Thread debugging using libthread_db enabled]
[New Thread 0x7ffff7ff1710 (LWP 6706)]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff44147e4 in __cxa_allocate_exception () from /usr/lib/libstdc++.so.6
(gdb) bt
#0  0x00007ffff44147e4 in __cxa_allocate_exception () from /usr/lib/libstdc++.so.6
#1  0x00007ffff653467d in File (this=0x7fffffffd150, filename=..., mode=Gosu::fmRead) at FileUnix.cpp:56
#2  0x00007ffff65338b0 in Gosu::loadFile (buffer=..., filename=...) at IO.cpp:49
#3  0x00007ffff653f1f1 in Gosu::quickLoadBitmap (filename=...) at BitmapUtils.cpp:9
#4  0x00007ffff652eec4 in Gosu::loadBitmap (val=<value optimized out>) at RubyGosu_wrap.cxx:2289
#5  0x00007ffff652f7a5 in new_Gosu_Image__SWIG_0 (argc=2, argv=<value optimized out>, self=18137728) at RubyGosu_wrap.cxx:2583
#6  _wrap_new_Image__SWIG_0 (argc=2, argv=<value optimized out>, self=18137728) at RubyGosu_wrap.cxx:6201
#7  0x00007ffff652fc98 in _wrap_new_Image (nargs=2, args=0x7ffff7e94130, self=18137728) at RubyGosu_wrap.cxx:6326
#8  0x00007ffff7b3bb72 in vm_call0 (klass=<value optimized out>, recv=<value optimized out>, mid=456, argc=<value optimized out>, argv=<value optimized out>, 
    scope=<value optimized out>, self=6) at vm_eval.c:71
#9  rb_call0 (klass=<value optimized out>, recv=<value optimized out>, mid=456, argc=<value optimized out>, argv=<value optimized out>, scope=<value optimized out>, 
    self=6) at vm_eval.c:249
#10 0x00007ffff7b3c434 in rb_call (recv=<value optimized out>, mid=<value optimized out>, argc=<value optimized out>, argv=0x1) at vm_eval.c:255
#11 rb_funcall2 (recv=<value optimized out>, mid=<value optimized out>, argc=<value optimized out>, argv=0x1) at vm_eval.c:433
#12 0x00007ffff7aa3510 in rb_class_new_instance (argc=2, argv=0x7ffff7e94130, klass=<value optimized out>) at object.c:1482
#13 0x00007ffff7b39622 in vm_call_cfunc (th=<value optimized out>, reg_cfp=<value optimized out>, num=<value optimized out>, id=<value optimized out>, 
    oid=<value optimized out>, recv=0, klass=6864368, flag=14, mn=0x6860f8, blockptr=0x0) at vm_insnhelper.c:384
#14 0x00007ffff7b4528b in vm_call_method (th=0x603c30, cfp=0x7ffff7f93cb0, num=2, blockptr=0x7ffff7deef40, flag=14, id=140737488342584, mn=0xb11b00, recv=8848000)
    at vm_insnhelper.c:517
#15 0x00007ffff7b3f820 in vm_exec_core (th=0x603c30, initial=<value optimized out>) at insns.def:999