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! { dg-do compile }

!

! PR fortran/35033

!

! The checks for assignments were too strict.

!

MODULE m1

          INTERFACE ASSIGNMENT(=)

             SUBROUTINE s(a,b)

                 REAL,INTENT(OUT) :: a(1,*)

                 REAL,INTENT(IN) :: b(:)

             END SUBROUTINE

          END Interface

contains

  subroutine test1()

          REAL,POINTER :: p(:,:),q(:)

          CALL s(p,q)

          p = q

  end subroutine test1

end module m1

MODULE m2

          INTERFACE ASSIGNMENT(=)

             SUBROUTINE s(a,b)

                 REAL,INTENT(OUT),VOLATILE :: a(1,*)

                 REAL,INTENT(IN) :: b(:)

             END SUBROUTINE

          END Interface

contains

  subroutine test1()

          REAL,POINTER :: p(:,:),q(:)

          CALL s(p,q) ! { dg-error "requires an assumed-shape or pointer-array dummy" }

!TODO: The following is rightly rejected but the error message is misleading.

! The actual reason is the mismatch between pointer array and VOLATILE

          p = q ! { dg-error "Incompatible ranks" }

  end subroutine test1

end module m2

MODULE m3

          INTERFACE ASSIGNMENT(=)

             module procedure s

          END Interface

contains

             SUBROUTINE s(a,b) ! { dg-error "must not redefine an INTRINSIC type" }

                 REAL,INTENT(OUT),VOLATILE :: a(1,*)

                 REAL,INTENT(IN) :: b(:,:)

             END SUBROUTINE

end module m3