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From: "jkozdon at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/54784] [OOP] allocation of extended types with polymorphic allocatable members
Date: Tue, 02 Oct 2012 22:15:00 -0000 [thread overview]
Message-ID: <bug-54784-4-WcrtaW5zW6@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-54784-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54784
--- Comment #2 from Jeremy Kozdon <jkozdon at gmail dot com> 2012-10-02 22:14:57 UTC ---
So there is actually two different bugs, one is the invalid memory reference
which happens when you don't allocate in order.
There is a second, the one I was really trying to report, and that's when
allocating in my original example type(block1d) before type(block2d), namely
the call
call d%addBlock(1,b1)
call d%addBlock(2,b2)
as opposed to
call d%addBlock(1,b2)
call d%addBlock(2,b1)
This gives the error:
a.out(4678) malloc: *** error for object 0x7fff82ec09be: pointer being freed
was not allocated
*** set a breakpoint in malloc_error_break to debug
Program received signal SIGABRT: Process abort signal.
Backtrace for this error:
#0 0x100004fbe
#1 0x1000056d4
#2 0x7fff82f1f1b9
Abort trap
(In reply to comment #1)
> Thanks for reporting this. I can reproduce it with 4.7 and trunk. Here is a
> reduced test case:
>
> program bug
> implicit none
>
> type :: block
> real, allocatable :: fields
> end type
>
> type :: list
> class(block),allocatable :: B
> end type
>
> type :: domain
> type(list),dimension(2) :: L
> end type
>
> type(domain) :: d
> type(block) :: b1
>
> allocate(d%L(2)%B,source=b1)
>
> end program bug
>
>
>
> This fails at runtime with:
>
> Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
>
> Backtrace for this error:
> #0 0x7F379D1FDA97
> #1 0x7F379D1FE074
> #2 0x7F379C72ED9F
> #3 0x400804 in __copy_bug_Block at bug.f90:9
> #4 0x40097C in bug at bug.f90:19 (discriminator 2)
> Segmentation fault
>
>
> valgrind shows:
>
> ==11046== Invalid read of size 8
> ==11046== at 0x400804: __copy_bug_Block (bug.f90:9)
> ==11046== by 0x40097C: MAIN__ (bug.f90:19)
> ==11046== by 0x400A88: main (bug.f90:21)
> ==11046== Address 0x0 is not stack'd, malloc'd or (recently) free'd
next prev parent reply other threads:[~2012-10-02 22:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-02 20:07 [Bug fortran/54784] New: [oop] " jkozdon at gmail dot com
2012-10-02 21:52 ` [Bug fortran/54784] [OOP] " janus at gcc dot gnu.org
2012-10-02 22:15 ` jkozdon at gmail dot com [this message]
2012-10-02 22:36 ` janus at gcc dot gnu.org
2012-10-02 22:46 ` janus at gcc dot gnu.org
2012-10-02 23:44 ` janus at gcc dot gnu.org
2012-10-03 10:38 ` janus at gcc dot gnu.org
2012-10-03 16:09 ` [Bug fortran/54784] [4.7/4.8 Regression] [OOP] wrong code in polymorphic allocation with SOURCE janus at gcc dot gnu.org
2012-10-08 16:23 ` sfilippone at uniroma2 dot it
2012-10-09 10:00 ` sfilippone at uniroma2 dot it
2012-10-10 11:49 ` janus at gcc dot gnu.org
2012-10-11 17:53 ` janus at gcc dot gnu.org
2012-10-11 17:58 ` janus at gcc dot gnu.org
2012-10-14 22:16 ` janus at gcc dot gnu.org
2012-10-14 22:27 ` janus at gcc dot gnu.org
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