[Bug c++/101029] [10/11/12 regression] unexpected error: non-constant condition for static assertion in gcc 10/11, but not 9 (clang also fine)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101029

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's only fixed on trunk so far, which will become the 12.1 release in 10-11
months.

It's a regression, so either the compiler fix should get backported to the
release branches (including the gcc-10 branch) or the static_assert in the
standard library header should get removed.

https://gcc.gnu.org/develop.html