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Date: Thu, 14 Feb 2008 23:05:00 -0000
Subject: [Bug fortran/35203]  New: OPTIONAL, VALUE actual argument cannot be an INTEGER 0
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From: "toon at moene dot indiv dot nluug dot nl" <gcc-bugzilla@gcc.gnu.org>
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Run this program:

      INTERFACE
      SUBROUTINE AAP(I)
      INTEGER, OPTIONAL, VALUE :: I
      END SUBROUTINE
      END INTERFACE
      CALL AAP(0)
      END
      SUBROUTINE AAP(N)
      INTEGER, OPTIONAL, VALUE :: N
      IF (PRESENT(N)) THEN
         PRINT*,'PRESENT, WITH VALUE:',N
      ELSE
         PRINT*,'NOT PRESENT'
      ENDIF
      END

and get:

$ ./a.out
 NOT PRESENT
$

which should come to no surprise, if one glazes his/her eyes over
trans_expr.c:gfc_conv_missing_dummy.


-- 
           Summary: OPTIONAL, VALUE actual argument cannot be an INTEGER 0
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: toon at moene dot indiv dot nluug dot nl


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35203