[Bug fortran/56814] New: [4.8/4.9 Regression] Bogus Interface mismatch in dummy procedure

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56814

             Bug #: 56814
           Summary: [4.8/4.9 Regression] Bogus Interface mismatch in dummy
                    procedure
    Classification: Unclassified
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org
                CC: janus@gcc.gnu.org


The following code compiles with ifort and gfortran 4.5 to 4.7. With 4.8 and
4.9 it fails with:

Error: Interface mismatch in dummy procedure 'fun' at (1): PROCEDURE POINTER
mismatch in function result

However, to me the interfaces look the same.


Reported at comp.lang.fortran by Macro Restelli,
https://groups.google.com/forum/?fromgroups=#!topic/comp.lang.fortran/rfoD-brnIqI


module m1
 abstract interface
  pure function i_f(x) result(d)
   real, intent(in) :: x(:,:)
   real :: d(size(x,1),size(x,2))
  end function i_f
 end interface

 procedure(i_f), pointer :: f => null()
end module m1

module m2
contains
 pure subroutine ns_dirdata(fun)
  interface
   pure function fun(x) result(d)
    real, intent(in) :: x(:,:)
    real :: d(size(x,1),size(x,2))
   end function fun
  end interface
 end subroutine ns_dirdata
end module m2

program p
 use m1
 use m2
  call ns_dirdata(f)
end program p