[Bug libstdc++/59192] error: use of deleted function ‘A?=::A(const A&)=?UTF-8?Q?’

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59192

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It should be done for GCC 5.0

The WIP patch is not reliable.