[Bug c++/110102] [13 regression] initializer_list ctors of containers skip Allocator_traits::construct, copies move-only type

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110102

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
      Known to work|                            |14.0
      Known to fail|14.0                        |
            Summary|[13/14 regression]          |[13 regression]
                   |initializer_list ctors of   |initializer_list ctors of
                   |containers skip             |containers skip
                   |Allocator_traits::construct |Allocator_traits::construct
                   |, copies move-only type     |, copies move-only type
           Assignee|unassigned at gcc dot gnu.org      |jason at gcc dot gnu.org

--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed on trunk so far.

(In reply to Arthur O'Dwyer from comment #6)
> Before C++20, I got tons of the same question for GCC's acceptance of
>     int f(auto x) { return x; }

Looks like that was fixed in GCC 8.

> I still think it would be nice if GCC stopped supporting
>     int f(std::vector<auto> v) { return v[0]; }
> , at least silently by default.

Fixed (to require -fconcepts-ts) on trunk.