[Bug libstdc++/64441] A match_results returns an incorrect sub_match if the sub_match::matched is false

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64441

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-03-09
     Ever confirmed|0                           |1