RECURSION_EXIST 2744 ext/mbstring/oniguruma/regcomp.c r = RECURSION_EXIST; RECURSION_EXIST 2755 ext/mbstring/oniguruma/regcomp.c if (r == RECURSION_EXIST) { RECURSION_EXIST 2782 ext/mbstring/oniguruma/regcomp.c return (head == 0 ? RECURSION_EXIST : RECURSION_INFINITE);