[Bug c++/109083] [10/11/12/13 Regression] Incorrect static_assert shown in diagnostics

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109083

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
I wonder why we instantiate from unused_function (but don't diagnose) at all?