[Bug c++/72764] [5/6/7 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

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72764

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Paolo, any progress with this?
The last mail on the subject is
http://gcc.gnu.org/ml/gcc-patches/2017-01/msg01813.html