Thanks for you explanation. I'll fix that soon.
Regards
Rodrigo
On Feb 13, 2008 12:30 AM, Przemyslaw Czerpak <[EMAIL PROTECTED]> wrote:
> On Tue, 12 Feb 2008, Rodrigo Miguel wrote:
> > Hi Pritpal,
> > I'm facing the same issue with xhgtk library, it's basically the same
> thing
> > except that I'm using with the Browse Class.
> > Here's the error message:
> > Error BASE/1301 Object Destructor Failure: Reference to freed block
> > BASE/1301 Object Destructor Failure: Reference to freed block
> > Total memory allocated: 557807 bytes (4590 block(s))
> > WARNING! Memory allocated but not released: 36 bytes (1 block(s))
> > fm.c:623: HB_TR_ERROR Block 1 (size 32) XHGTK_TREE_ITER_NEW(0), "08,
> 8.900/8-
> > E.9000000000000000E00*91723)9-0.A.F000200000002000000"
> > Even removing the destructor clause and put the call to xhgtk_tree_iter
> to
> > the "destroy" event through the callbacks, I got this error above
>
> Yes it is. And it's a bug in XHGTK code. Here is self contain reduced
> example:
>
> proc main()
> XHGTK_TREE_ITER_NEW()
> return
> #pragma begindump
> HB_FUNC( XHGTK_TREE_ITER_NEW )
> {
> void * treeiter = (void *) hb_gcAlloc(sizeof(void *), NULL);
> hb_retptr(treeiter);
> }
> #pragma enddump
>
> It's a little bit modified to compile without GTK header files.
> I do not know what this function should do but it's a bug in
> Harbour and xHarbour though only Harbour can detected it and
> report error. In xHarbour it will cause internal memory corruption
> because this GC block is freed by garbage collector in first GC
> pass after allocations and then this memory can be reused for
> other things so if you will try to write sth to this block you
> will corrupt some other data. All GC memory blocks have to be
> attached to GC items or freed by hb_gcUnlock(). And before
> attaching and freeing you cannot activate GC because it will
> free the block immediately. It's a serious bug and have to
> be fixed.
>
> best regards,
> Przemek
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>
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