RECURSION_INFINITE 2730 regcomp.c      	if (ret < 0 || ret == RECURSION_INFINITE) return ret;
RECURSION_INFINITE 2747 regcomp.c      	if (ret < 0 || ret == RECURSION_INFINITE) return ret;
RECURSION_INFINITE 2782 regcomp.c            return (head == 0 ? RECURSION_EXIST : RECURSION_INFINITE);