[Bug libstdc++/112942] [LWG2766] swap(variant&, variant&) is incorrectly marked as deleted

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112942

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> Just giving background information of the wording changes to C++17 on
> std::variant and std::swap here and about the testcase you pointed to and
> about when it was added specifcially while changing for that defect report.

The test case verifies the LWG 2766 behaviour, *not* the LWG 2749 behaviour.