[Bug c++/94890] std::tuple({0}) fails to compile with -std=c++2a

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94890

--- Comment #8 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
(In reply to Marek Polacek from comment #6)
> Thanks Ville.  What I should have said...
> 
> (In reply to Marek Polacek from comment #4)
> > My current theory is that it is not a bug.
> 
> ...in the compiler proper.  It'd be nice if the original test compiled.

No worries. This needs two library fixes and an LWG issue, I'll take care of
it.