[Bug libstdc++/86127] STL containers do not satisfy container.requirements.general clause 8

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86127

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The allocator requirements say that move construction must be equivalent to
copy construction, and allocators should be cheap to copy anyway. I don't
consider this a bug.