[Bug c++/101906] Constant evaluation failure in concepts

[ppalka at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101906

--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
FWIW one workaround is to use a class template instead of an alias template,
e.g.

  -template<int> using voidify = void;
  +template<int> struct voidify {};