[Bug libstdc++/113007] `std::variant` converting constructor and `operator=` compile while the C++ Standard says they must not

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113007

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> The _Arr struct is needed to ensure that we're trying to convert to T{1} not

Oops, I mean T[1] not T{1} of course!