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! { dg-do compile }

! One of the tests of the patch for PR30068.

! Taken from the fortran standard.

!

! The interface is invalid although it is unambiguous because the

! standard explicitly does not require recursion into the formal

! arguments of procedures that themselves are interface arguments.

!

module xx

  INTERFACE BAD9

    SUBROUTINE S9A(X)

      REAL :: X

    END SUBROUTINE S9A

    SUBROUTINE S9B(X)

      INTERFACE

        FUNCTION X(A)

          REAL :: X,A

        END FUNCTION X

      END INTERFACE

    END SUBROUTINE S9B

    SUBROUTINE S9C(X)

      INTERFACE

        FUNCTION X(A)

          REAL :: X

          INTEGER :: A

        END FUNCTION X

      END INTERFACE

    END SUBROUTINE S9C  ! { dg-error "Ambiguous interfaces" }

  END INTERFACE BAD9

end module xx

! { dg-final { cleanup-modules "xx" } }