[Bug libstdc++/117889] [15 regression] Failure to build qtwebengine-6.8.1

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117889

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-12-03
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I see the difference between this one and PR 117858.

This is doing a construction of std::optional while the other is doing a
operator=.

So the reduced testcase is just:
```
#include <optional>

struct Focus
{
  template<class T> Focus(T newValue) ;
};
void g(std::optional<Focus> f)
{
  std::optional<Focus> b = f;
}
```