From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-473607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 13761 invoked by alias); 16 Jan 2015 21:28:24 -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 13715 invoked by uid 48); 16 Jan 2015 21:28:18 -0000
From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/60922] [4.9/5 regression]  Memory leak with INTENT(OUT) CLASS argument w/ allocatable CLASS components
Date: Fri, 16 Jan 2015 21:28:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: janus at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P4
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.9.3
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_status
Message-ID: <bug-60922-4-oIjSEBGKAI@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-60922-4@http.gcc.gnu.org/bugzilla/>
References: <bug-60922-4@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: 2015-01/txt/msg01601.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60922

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #6 from janus at gcc dot gnu.org ---
Here is a reduced and cleaned-up test case:


program test_leak
  implicit none

  type d_base_vect_type
  end type

  type d_vect_type
    class(d_base_vect_type), allocatable :: v
  end type

  type(d_vect_type) :: ainvd
  integer :: itx

  do itx=1,2
    write(*,*) 'Iteration ',itx
    call d_vect_bld_x(ainvd)
  end do

contains

  subroutine d_vect_bld_x(x)
    class(d_vect_type), intent(out) :: x
    allocate(x%v)
  end subroutine

end program


With 4.9 and trunk (but not with 4.8), valgrind shows:

==11044== 1 bytes in 1 blocks are definitely lost in loss record 2 of 2
==11044==    at 0x4C2ABA0: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11044==    by 0x40102F: d_vect_bld_x.3431 (test_leak.f90:23)
==11044==    by 0x400EA3: MAIN__ (test_leak.f90:16)
==11044==    by 0x401096: main (test_leak.f90:14)