[Bug libstdc++/85642] [8/9 Regression] Wrong implicit exception-specification with std::optional

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85642

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-05-04
          Component|c++                         |libstdc++
      Known to work|                            |7.3.0
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org
   Target Milestone|---                         |8.2
            Summary|Wrong implicit              |[8/9 Regression] Wrong
                   |exception-specification     |implicit
                   |with std::optional          |exception-specification
                   |                            |with std::optional
     Ever confirmed|0                           |1
      Known to fail|                            |8.1.0, 9.0

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think I see where the problem is ...