[Bug c++/52036] C++11 allows template parameters to have internal linkage

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52036

--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #14)
> For this PR, the only remaining bug seems to be comment 8.

Which works in C++17 mode, so is only a bug for C++11 and C++14.