From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-457211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 23777 invoked by alias); 28 Jul 2014 08:13:09 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 23721 invoked by uid 48); 28 Jul 2014 08:13:05 -0000
From: "Joost.VandeVondele at mat dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/61933] New: Inquire on internal units
Date: Mon, 28 Jul 2014 08:13:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 4.10.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: Joost.VandeVondele at mat dot ethz.ch
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter
Message-ID: <bug-61933-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-07/txt/msg01802.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61933

            Bug ID: 61933
           Summary: Inquire on internal units
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Joost.VandeVondele at mat dot ethz.ch

It would be nice if the the following code

> cat test.f90
   LOGICAL :: file_exists
   INQUIRE(UNIT=-1,EXIST=file_exists)
   WRITE(6,*) file_exists
END

would error out at runtime, since

F2008:
If le-unit-number identies an internal unit (9.6.4.8.3), an error condition
occurs.

F2003:
The value of file-unit-number shall be nonnegative or equal to one of the named
constants INPUT UNIT,
9 OUTPUT UNIT, or ERROR UNIT of the ISO FORTRAN ENV intrinsic module (13.8.2).

The Cray compiler generates an error in this case:

lib-4017 : UNRECOVERABLE library error
  The INQUIRE statement must not specify an internal file.