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Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7d626c0 (LWP 7038)]
0x081081c8 in rubinius::VM::alive_p (this=0x0) at vm/vm.hpp:273
273	      return alive_;
(gdb) bt 10
#0  0x081081c8 in rubinius::VM::alive_p (this=0x0) at vm/vm.hpp:273
#1  0x08107e57 in rubinius::VMManager::prune (this=0xbf967df4)
    at vm/vm_manager.cpp:48
#2  0x0814aec0 in rubinius::VM::collect_maybe (this=0x9e48fd8, 
    call_frame=0xbf944960) at vm/vm.cpp:348
#3  0x080df684 in rubinius::VMMethod::run_interpreter (state=0x9e48fd8, 
    vmm=0x9f736a8, call_frame=0xbf944960) at vm/vmmethod.cpp:700
#4  0x080e451d in rubinius::VMMethod::execute_specialized<rubinius::GenericArguments> (state=0x9e48fd8, previous=0xbf9463d0, msg=@0x9e9cbd8, args=@0xbf944c4c)
    at vm/vmmethod.cpp:529
#5  0x081f4deb in rubinius::VMMethod::interpreter (state=0x9e48fd8, 
    vmm=0x9e9cb28, call_frame=0xbf9463d0) at vm/gen/instructions.cpp:2664
#6  0x080df6d6 in rubinius::VMMethod::run_interpreter (state=0x9e48fd8, 
    vmm=0x9e9cb28, call_frame=0xbf9463d0) at vm/vmmethod.cpp:708
#7  0x080e562f in rubinius::VMMethod::execute_specialized<rubinius::SplatOnlyArgument> (state=0x9e48fd8, previous=0xbf947e40, msg=@0x9f73568, args=@0xbf9466bc)
    at vm/vmmethod.cpp:529
#8  0x081f492c in rubinius::VMMethod::interpreter (state=0x9e48fd8, 
    vmm=0x9f731f8, call_frame=0xbf947e40) at vm/gen/instructions.cpp:2600
#9  0x080df6d6 in rubinius::VMMethod::run_interpreter (state=0x9e48fd8, 
    vmm=0x9f731f8, call_frame=0xbf947e40) at vm/vmmethod.cpp:708