[Bug c++/51553] brace initialization and conversion operators

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51553

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
clang and EDG give errors for 1, 2, 3, 3a and 4, exactly as GCC used to.