https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64239
--- Comment #3 from Mitsuru Kariya <kariya_mitsuru at hotmail dot com> --- Sorry, I confused the copy ctor with the copy assignment operator. But it seems that both are same results. operator= version : http://melpon.org/wandbox/permlink/ZHzYukOyuluuzpwu I didn't notice, but both the copy ctor and the copy assignment operator of match_results are also same results as Mr. Wakely pointed out above. copy ctor version : http://melpon.org/wandbox/permlink/Z4Z0kr5yTcB0iyEk operator= version : http://melpon.org/wandbox/permlink/tHBSWP3hJpinggzw
