[Bug c++/67491] [meta-bug] concepts issues

[ryan.burn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491
Bug 67491 depends on bug 68434, which changed state.

Bug 68434 Summary: [concepts] function tsubst sets TYPE_CANONICAL before setting a type's PLACEHOLDER_TYPE_CONSTRAINTS
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68434

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED