idNULL           15899 ext/ripper/ripper.c 	return NEW_LIT(ID2SYM(idNULL));
idNULL           10150 ext/ripper/ripper.y 	return NEW_LIT(ID2SYM(idNULL));
idNULL            113 id.c               REGISTER_SYMID(idNULL, ""/*NULL*/"");
idNULL           15823 parse.c        	return NEW_LIT(ID2SYM(idNULL));
idNULL           10150 parse.y        	return NEW_LIT(ID2SYM(idNULL));
idNULL           4584 thread.c           const VALUE sym = mid ? ID2SYM(mid) : ID2SYM(idNULL);