* include/bits/regex_cursor.h: Fix _M_set_pos().
* include/bits/regex_grep_matcher.h: add _M_dfs_match().
* include/bits/regex_grep_matcher.tcc: Implement it.
- * testsuite/28_regex/algorithms/regex_match/extended/string_group_01.cc:
- New.
- * testsuite/28_regex/algorithms/regex_match/extended/string_group_02.cc:
- New.
+ * testsuite/28_regex/algorithms/regex_match/extended/53622.cc: New.
+ * testsuite/28_regex/algorithms/regex_match/extended/57173.cc: New.
* testsuite/28_regex/algorithms/regex_search/basic/string_01.cc:
Remove xfail.