[Bug c++/65954] gcc segfaults on the following input with a syntax error

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65954

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

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

--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Added expected diagnostic