[Bug fortran/20871] New: error needed

[jv244 at cam dot ac dot uk]

The following is non-standard and the compiler should probably generate a
warning/error with '-pedantic -std=f95'

MODULE TT
CONTAINS
   ELEMENTAL INTEGER FUNCTION two(N)
     INTEGER, INTENT(IN) :: N
     two=2**N
   END FUNCTION
END MODULE
USE TT
 INTEGER, EXTERNAL  :: SUB
 write(6,*) SUB(two) ! 12.4
END
INTEGER FUNCTION SUB(XX)
  INTEGER :: XX
  SUB=XX()
END

-- 
           Summary: error needed
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20871