[Bug libstdc++/87809] [9 Regression] Can't create empty std::optional>

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87809

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
      Known to work|                            |8.2.0
           Keywords|                            |rejects-valid
   Last reconfirmed|                            |2018-10-30
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|Can't create empty          |[9 Regression] Can't create
                   |std::optional<std::vector<i |empty
                   |nt, CustomAlloc>>           |std::optional<std::vector<i
                   |                            |nt, CustomAlloc>>
   Target Milestone|---                         |9.0
      Known to fail|                            |9.0

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
mine