[Bug fortran/29975] [meta-bugs] ICEs with CP2K

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

------- Comment #23 from burnus at gcc dot gnu dot org  2006-12-03 22:49 -------
(In reply to comment #20)
 > now gives a warning in interface_1.f90, rather than an error.
I think one can live with this - Lahey also gives only a warning. (ifort a
warning; Richard says it is invalid.)

However, one gets neither a warning nor an error for the following test case,
which can be found in the Fortran 2003 standard, Section C.11.2:

INTERFACE BAD8 ! this interface is invalid !
  ! despite the fact that it is unambiguous !
  SUBROUTINE S8A(X,Y,Z)
    REAL,OPTIONAL :: X
    INTEGER :: Y
    REAL :: Z
  END SUBROUTINE S8A
  SUBROUTINE S8B(X,Z,Y)
    INTEGER,OPTIONAL :: X
    INTEGER :: Z
    REAL :: Y
  END SUBROUTINE S8B
END INTERFACE BAD8


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29975