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From: "ryan.maclellan at ua dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/52087] New: program does not follow logical rules
Date: Thu, 02 Feb 2012 00:17:00 -0000	[thread overview]
Message-ID: <bug-52087-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52087

             Bug #: 52087
           Summary: program does not follow logical rules
    Classification: Unclassified
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libfortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ryan.maclellan@ua.edu


Created attachment 26549
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26549
minimal source code to reproduce bug (5 lines)

The following program tests if the input logical variable is a valid logical
variable.  It only behaves as expected if the two logical tests are separately
in () although from the order of operations I would expect it to work as is. 
Incidentally, if I make nt_save .false. or interchange the true and false in
the if statement it does work without the ().

does not write:
      program main

      logical*4 nt_save/.true./

      if ( nt_save.eqv..true. .or. nt_save.eqv..false. ) then
         write(*,*) nt_save
      endif
      end


does write with
      if ( (nt_save.eqv..true.) .or. (nt_save.eqv..false.) ) then


             reply	other threads:[~2012-02-02  0:17 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-02  0:17 ryan.maclellan at ua dot edu [this message]
2012-02-02  0:46 ` [Bug libfortran/52087] " kargl at gcc dot gnu.org
2012-02-02  0:58 ` ryan.maclellan at ua dot edu
2012-02-02  2:10 ` sgk at troutmask dot apl.washington.edu
2012-02-02  2:32 ` ryan.maclellan at ua dot edu
2012-02-02  8:36 ` burnus at gcc dot gnu.org

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