[Bug c++/84423] [6/7/8 Regression] [concepts] ICE with invalid using declaration

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84423

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Priority|P3                          |P4
   Target Milestone|---                         |6.5