[Bug fortran/25036] New: Reopening a file with STATUS='UNKNOWN' should work

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

The program

       program test
       integer :: fh = 71
       open(fh, file="f", form='unformatted', status='unknown')
!      close(fh)
       open(fh, file="f", form='unformatted', status='unknown')
       end program

fails with

At line 5 of file file-status-old.f90
Fortran runtime error: OPEN statement must have a STATUS of OLD

The F2003 standard says that if status='unknown', which is the same as if no
status specifier is present, then the status is processor dependent. So
technically this is not a standard conformance bug, but it's still a problem
for some real codes, and it doesn't cost us anything to allow it.

Thanks to Bernhard Fischer for bringing up this problem.


-- 
           Summary: Reopening a file with STATUS='UNKNOWN' should work
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: jb at gcc dot gnu dot org
        ReportedBy: jb at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25036