[Bug c++/92856] incorrectly accepts invalid C++11 braced initialisation of double from long double

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92856

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's a different bug, so thanks for filing it separately (PR 94590).