https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98810
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-01-25
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Keywords| |ice-on-valid-code
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
clang accepts it with -std=c++17, GCC rejects it there with
t.C:2:41: error: non-type template parameters of class type only available with
'-std=c++20' or '-std=gnu++20'
