NUM_NONREG_ITEMS 1332 regex.cpp      #define MAX_FAILURE_ITEMS (5 * NUM_REG_ITEMS + NUM_NONREG_ITEMS)
NUM_NONREG_ITEMS 1339 regex.cpp         + NUM_NONREG_ITEMS)
NUM_NONREG_ITEMS 1370 regex.cpp        assert (fail_stack.avail >= NUM_NONREG_ITEMS);			\