On Thu, 27 Mar 2025 at 14:44, Thiago Macieira via Std-Proposals <std-proposals@lists.isocpp.org> wrote:
On Thursday, 27 March 2025 03:56:58 Pacific Daylight Time Frederick Virchanza
Gotham via Std-Proposals wrote:
> Not to sound too farcical, but that diagnostic message can be fixed if
> you pipe g++ (or clang) into 'sed' at the command line as follows:
>
>     g++ -o prog main.cpp | sed 's/call to
> non-\xe2\x80\x98constexpr\xe2\x80\x99 function \xe2\x80\x98void
> __assert_fail\x28const char\*, const char\*, unsigned int, const
> char\*\x29\xe2\x80\x99/Assertion failed in constant-evaluated
> context/g'

Now try with a different $LANG in your env.
 

Then submit a request for improvement for your toolchain.

Don't bother:  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119497