[Bug libstdc++/78956] std::thread doesn't fully meet LWG 2097 requirement

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78956

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unknown                     |5.4.0
   Target Milestone|---                         |5.5
      Known to fail|                            |5.4.0, 6.3.0, 7.0

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 5.5 and 6.4