https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81919

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-08-22
                 CC|                            |ebotcazou at gcc dot gnu.org
            Summary|Compiler refuses to compile |type derived from
                   |valid code                  |instantiation of
                   |                            |Ada.Iterator_Interfaces
                   |                            |wrongly rejected
     Ever confirmed|0                           |1

--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> We think that the refusal to compile it is a compiler bug.
> 
> Note that if I remove "type Iterated_Object is access all Integer;" and
> replace "type Cursor is new Iterated_Object;" with "type Cursor is access
> all Integer;" then the compiler does not complaint.

Yes, the behaviour is rather inconsistent.

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