[Bug libfortran/20930] New: [4.0 Regression] gfortran.dg/backspace.f execution test

[Bug libfortran/20930] New: [4.0 Regression] gfortran.dg/backspace.f execution test

[danglin at gcc dot gnu dot org]

Executing on host: /test/gnu/gcc-3.3/objdir/gcc/testsuite/../gfortran -B/test/gn
u/gcc-3.3/objdir/gcc/testsuite/../ /test/gnu/gcc-3.3/gcc/gcc/testsuite/gfortran.
dg/backspace.f   -O0   -pedantic-errors  -L/test/gnu/gcc-3.3/objdir/hppa64-hp-hp
ux11.11/./libgfortran/.libs -L/test/gnu/gcc-3.3/objdir/hppa64-hp-hpux11.11/./lib
iberty  -lm   -o ./backspace.exe    (timeout = 300)
PASS: gfortran.dg/backspace.f  -O0  (test for excess errors)
Setting LD_LIBRARY_PATH to .:/test/gnu/gcc-3.3/objdir/hppa64-hp-hpux11.11/./libg
fortran/.libs:/test/gnu/gcc-3.3/objdir/gcc:.:/test/gnu/gcc-3.3/objdir/hppa64-hp-
hpux11.11/./libgfortran/.libs:/test/gnu/gcc-3.3/objdir/gcc:/opt/gnu64/gcc/gcc-3.
5.0/lib
FAIL: gfortran.dg/backspace.f  -O0  execution test

-- 
           Summary: [4.0 Regression] gfortran.dg/backspace.f execution test
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libfortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: danglin at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: hppa*-*-hpux*
  GCC host triplet: hppa*-*-hpux*
GCC target triplet: hppa*-*-hpux*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-10 16:34 -------
Does this work on the mainline?
If so the following patch fixes it:
2005-04-08  Eric Botcazou  <ebotcazou@libertysurf.fr>

        * io/backspace.c (unformatted_backspace): Do not dereference
        the pointer to the stream.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[danglin at gcc dot gnu dot org]

------- Additional Comments From danglin at gcc dot gnu dot org  2005-04-10 16:39 -------
Eric's patch went in after my last mainline build and codesourcery isn't building
fortran.  I'll check.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-10 16:42 -------
Hmm, it is on the 4.0 branch too so it might not have fixed it.
I think powerpc-aix is also seeing the same failure.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[dje at gcc dot gnu dot org]

------- Additional Comments From dje at gcc dot gnu dot org  2005-04-25 19:10 -------
The problem (on AIX) appears to be related to reaching the end of file.  
Specifically,

   nr=0
20 continue
   read (3,end=30,err=90) n, (x(n),n=1,10)
   nr=nr+1
   goto 30
30 continue

counts the number of records.  When EOF is encountered, succeeding reads do 
not operate correctly.  I suspect something is not being reset correctly in 
the I/O subsystem.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dje at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
  GCC build triplet|hppa*-*-hpux*               |hppa*-*-hpux*. powerpc-ibm-
                   |                            |aix*
   GCC host triplet|hppa*-*-hpux*               |hppa*-*-hpux*, powerpc-ibm-
                   |                            |aix*
 GCC target triplet|hppa*-*-hpux*               |hppa*-*-hpux*, powerpc-ibm-
                   |                            |aix*
   Last reconfirmed|0000-00-00 00:00:00         |2005-04-25 19:10:31
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[dje at gcc dot gnu dot org]

------- Additional Comments From dje at gcc dot gnu dot org  2005-04-26 18:33 -------
The problem is due to libgfortran not flushing the record length marker to the 
file.  transfer.c:next_record_w() copies the record length into the buffer, 
but does not ensure that the buffer gets flushed to the file.  At a later 
point, libgfortran seeks past the file position and then back, which the UNIX 
standard allows the OS to fill with zeroes.  next_record_w() calls sfree(), 
but sfree() specifically does not flush the buffer if operating on the 
small_buffer in the unix_stream structure or the stream is buffered.  
Presumably when switching from writing to reading, the buffer should be 
flushed.

The call to REWIND sets the mode to reading and truncates the file before the 
call to flush in data_transfer_init() could occur.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[dje at gcc dot gnu dot org]

------- Additional Comments From dje at gcc dot gnu dot org  2005-04-26 18:53 -------
Patch:

http://gcc.gnu.org/ml/gcc-patches/2005-04/msg02697.html

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0/4.1 Regression] gfortran.dg/backspace.f execution test

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-26 21:57 -------
John, does this work now?

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2005-
                   |                            |04/msg02697.html
           Keywords|                            |patch
            Summary|[4.0 Regression]            |[4.0/4.1 Regression]
                   |gfortran.dg/backspace.f     |gfortran.dg/backspace.f
                   |execution test              |execution test


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0/4.1 Regression] gfortran.dg/backspace.f execution test

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-03 18:24 -------
(In reply to comment #7)
> John, does this work now?
Ping,

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0/4.1 Regression] gfortran.dg/backspace.f execution test

[dave at hiauly1 dot hia dot nrc dot ca]

------- Additional Comments From dave at hiauly1 dot hia dot nrc dot ca  2005-05-03 22:39 -------
Subject: Re:  [4.0/4.1 Regression] gfortran.dg/backspace.f execution test

> ------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-03 18:24 -------
> (In reply to comment #7)
> > John, does this work now?
> Ping,

Yes.  See <http://gcc.gnu.org/ml/gcc-testresults/2005-05/msg00184.html>.

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[danglin at gcc dot gnu dot org]

------- Additional Comments From danglin at gcc dot gnu dot org  2005-05-14 20:58 -------
See comment #9.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[dje at gcc dot gnu dot org]

------- Additional Comments From dje at gcc dot gnu dot org  2005-05-15 19:54 -------
This bug has not been fixed on the 4.0 branch

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[dje at gcc dot gnu dot org]

------- Additional Comments From dje at gcc dot gnu dot org  2005-06-07 19:15 -------
gfortran patches are not being backported as originally promised.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at codesourcery dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-06-11 20:21 -------
Subject: Bug 20930

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	dje@gcc.gnu.org	2005-06-11 20:21:41

Modified files:
	libgfortran    : ChangeLog 
	libgfortran/io : rewind.c 

Log message:
	Backport from mainline:
	PR libfortran/20930
	* io/rewind.c (st_rewind): Flush the stream when resetting the mode
	from WRITING to READING.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libgfortran/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.163.2.48&r2=1.163.2.49
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libgfortran/io/rewind.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.9&r2=1.9.10.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930

[Bug libfortran/20930] [4.0 Regression] gfortran.dg/backspace.f execution test

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-13 03:23 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20930