DEBUG_PRINT2 (" match_null=%d", \
REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \
DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \
DEBUG_PRINT2 (" match_null=%d", \
REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \
DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \