STK_LOOK_BEHIND_NOT  599 ext/mbstring/oniguruma/regexec.c         STACK_PUSH(STK_LOOK_BEHIND_NOT,pat,s,sprev)
STK_LOOK_BEHIND_NOT  793 ext/mbstring/oniguruma/regexec.c     if (stk->type == STK_LOOK_BEHIND_NOT) break;\