[Bug libstdc++/122921] The value_type of flat_map's iterator should be pair<Key, T> instead of pair<const Key, T>

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122921

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

           What    |Removed                     |Added
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   Last reconfirmed|                            |2025-12-01
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |rejects-valid