[Bug c++/71737] [4.9/5/6/7 Regression] ICE following 2x pack expansion in non-pack with template alias

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71737

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |jason at gcc dot gnu.org
   Target Milestone|---                         |4.9.4
            Summary|[7 Regression] ICE          |[4.9/5/6/7 Regression] ICE
                   |following 2x pack expansion |following 2x pack expansion
                   |in non-pack with template   |in non-pack with template
                   |alias                       |alias

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r201469 started to reject this (before it has been accepted), and r201470
started to ICE on it after diagnosing it.  So likely error-recovery PR...