STK_MASK_POP_USED  707 regexec.c            if ((stk->type & STK_MASK_POP_USED) != 0)  break;\
STK_MASK_POP_USED  715 regexec.c            if ((stk->type & STK_MASK_POP_USED) != 0)  break;\
STK_MASK_POP_USED  727 regexec.c            if ((stk->type & STK_MASK_POP_USED) != 0)  break;\