MAX_POSBUF         27 vm_dump.c          char posbuf[MAX_POSBUF+1];
MAX_POSBUF        111 vm_dump.c      		snprintf(posbuf, MAX_POSBUF, "%s:%d", RSTRING_PTR(cfp->iseq->filename), line);
MAX_POSBUF        117 vm_dump.c      	snprintf(posbuf, MAX_POSBUF, ":%s", rb_id2name(cfp->method_id));