vm_set_eval_stack  125 vm.c               vm_set_eval_stack(th, iseqval, 0);
vm_set_eval_stack   21 vm_eval.c      static void vm_set_eval_stack(rb_thread_t * th, VALUE iseqval, const NODE *cref);
vm_set_eval_stack  727 vm_eval.c      	vm_set_eval_stack(th, iseqval, cref);