[Bug c++/57677] Fstream should be allowed to move when returned from a function

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57677

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
As I said on your other bug, this is documented as missing, you don't need to
report a dup of your own bug :)