rb_vm_backtrace_object  502 eval.c         		at = rb_vm_backtrace_object();
rb_vm_backtrace_object  511 eval.c         	    at = rb_vm_backtrace_object();
rb_vm_backtrace_object 1512 internal.h     VALUE rb_vm_backtrace_object(void);
rb_vm_backtrace_object  703 vm_args.c      	at = rb_vm_backtrace_object();
rb_vm_backtrace_object  707 vm_args.c      	at = rb_vm_backtrace_object();