[Bug fortran/35718] New: deallocating non-allocated pointer target does not fail

[Bug fortran/35718] New: deallocating non-allocated pointer target does not fail

[dick dot hendrickson at gmail dot com]

The following program fails to raise an error condition in the deallocate
statement.  The pointer target was not created by an allocate.

Dick Hendrickson

      program MF0069
! fails on Windows XP
! gcc version 4.4.0 20080312 (experimental) [trunk revision 133139]
! F95 page 83, line 34 says deallocating a pointer whose target
!wasn't created by an ALLOCATE causes error condition


      REAL, pointer  :: RLA(:)
      REAL, TARGET   :: RLA1(6)
      RLA1 = 0
      RLA => RLA1
      DEALLOCATE (RLA, STAT = ISTAT)
      IF (ISTAT .LE. 0) print *, 'deallocate did not fail!', istat
      END


-- 
           Summary: deallocating non-allocated pointer target does not fail
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dick dot hendrickson at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[burnus at gcc dot gnu dot org]

------- Comment #1 from burnus at gcc dot gnu dot org  2008-03-27 16:50 -------
Confirmed. gfortran deallocates the static memory as valgrind also complains:

==3839== Invalid free() / delete / delete[]
==3839==    at 0x4C2430F: free (in
/usr/lib64/valgrind/amd64-linux/vgpreload_memcheck.so)
==3839==    by 0x4008F2: MAIN__ (aaa.f90:12)
==3839==    by 0x4009BB: main (fmain.c:21)


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burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2008-03-27 16:50:00
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[tkoenig at gcc dot gnu dot org]

------- Comment #2 from tkoenig at gcc dot gnu dot org  2008-04-13 20:58 -------
Ouch.  That one will be hard to fix without keeping
state around in the descriptor.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[jv244 at cam dot ac dot uk]

------- Comment #3 from jv244 at cam dot ac dot uk  2008-08-08 21:13 -------
works correctly with e.g. ifort and xlf90, so worth fixing somehow.


-- 

jv244 at cam dot ac dot uk changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[pault at gcc dot gnu dot org]

------- Comment #4 from pault at gcc dot gnu dot org  2008-09-28 19:54 -------
(In reply to comment #3)
> works correctly with e.g. ifort and xlf90, so worth fixing somehow.
> 
Thomas' #2 is correct - see the present discussion on the list.

I think that we have to bite the bullet and change the API.

Paul


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[pault at gcc dot gnu dot org]

------- Comment #5 from pault at gcc dot gnu dot org  2008-11-06 06:23 -------
Hold this one to 4.5 since it needs the array descriptor reform.

Paul


-- 

pault at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |SUSPENDED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[pault at gcc dot gnu dot org]

-- 

pault at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |pault at gcc dot gnu dot org
                   |dot org                     |
             Status|SUSPENDED                   |ASSIGNED
   Last reconfirmed|2008-03-27 16:50:00         |2009-04-06 10:55:56
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718