[Bug c++/72763] [5/6/7/8 Regression] incorrectly accepts invalid C++11 code that instantiates a non-template class

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72763
Bug 72763 depends on bug 72764, which changed state.

Bug 72764 Summary: [7 Regression] ICE on invalid C++11 code instantiating an 
alias template: tree check: expected class ‘type’, have ‘exceptional’ 
(error_mark) in typedef_variant_p, at tree.c:12660
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72764

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