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Re: NSClassSwapper leaving dangling pointers?

From: Fred Kiefer
Subject: Re: NSClassSwapper leaving dangling pointers?
Date: Mon, 24 Jun 2013 21:07:08 +0200

This backtraces finally helped me understand what goes on here a bit better, at 
least I hope so.

NSClassSwapper not only replaces a specific object, it also registers itself as 
the delegate of the decoder to be able to replace the cells used by that 
object. This happens here and the decoded cell gets replaced by a newly created 
cell without transfering any of the already set values.

What I still don't understand is why the menu item uses its menu cell as the 
target. This ould be another difference to the GNUstep implementation. Could 
you please try to find out what the used action is?

At the moment I still don't have an idea how we could work around this issue. 
We should try to find out more about it.


On the road

Am 24.06.2013 um 11:49 schrieb Luboš Doležel <address@hidden>:

> Sorry for the spam, I have another backtraces providing a clear picture, 
> alhough they seem to be slightly different from the ones before.
> You can see an object being set as a target, then deallocated and then used 
> (with SIGSEGV).
> Luboš
> On Mon, 24 Jun 2013 10:21:18 +0200, Luboš Doležel wrote:
>> What I forgot to add:
>> Until gnustep-gui supports resource directory names like "en.lproj",
>> you have to symlink English.lproj->en.lproj to make it work (GNUstep
>> bug #36764).
>> This bug also prevents apps from working when mounted directly from a
>> .dmg file via my FUSE module, since the mounts are read-only.
>> Lubos
>> On Mon, 24 Jun 2013 09:52:51 +0200, Luboš Doležel wrote:
>>> Hi,
>>> great! Feel free to contact me via Jabber (same as mail address),
>>> should you run into any issues.
>>> Attached is the backtrace leading up to NSClassSwapper, as Germán requested.
>>> Lubos
> <darling-unarchiver2.txt>
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> Gnustep-dev mailing list
> address@hidden

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