RECURSION_INFINITE 2878 regcomp.c      	if (ret < 0 || ret == RECURSION_INFINITE) return ret;
RECURSION_INFINITE 2895 regcomp.c      	if (ret < 0 || ret == RECURSION_INFINITE) return ret;
RECURSION_INFINITE 2930 regcomp.c            return (head == 0 ? RECURSION_EXIST : RECURSION_INFINITE);