[Bug fortran/90230] newunit in open function is not threadsafe with openmp

[jb at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90230

Janne Blomqvist <jb at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |jb at gcc dot gnu.org
         Resolution|---                         |INVALID

--- Comment #1 from Janne Blomqvist <jb at gcc dot gnu.org> ---
It's not a thread-safety issue. If you uncomment the line

    close(lun)

you get the same error message also without OpenMP.  The reason is that
GFortran follows the Fortran standard which says that you may not open the same
file on multiple units.

That being said, Fortran 2018 removes that restriction, so future versions of
GFortran may behave differently.