VAR_FROM_MEMORY  1264 cont.c         	rb_context_t *cont = &VAR_FROM_MEMORY(fib)->cont;
VAR_FROM_MEMORY   141 eval_intern.h  # define VAR_INITIALIZED(var) ((var) = VAR_FROM_MEMORY(var))
VAR_FROM_MEMORY   169 eval_intern.h      (ruby_setjmp(_tag.buf) ? rb_threadptr_tag_state(VAR_FROM_MEMORY(_th)) : (TH_REPUSH_TAG(), 0))