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Core Data triggering an objc_assign_strongCast crash?!

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Core Data triggering an objc_assign_strongCast crash?!

Subject: Core Data triggering an objc_assign_strongCast crash?!
From: Nick Zitzmann <email@hidden>
Date: Wed, 10 Dec 2008 15:27:30 -0700

I've suddenly been experiencing a problem where calling - [NSManagedObject validateForDelete:] causes the method to call objc_assign_strongCast, which then mysteriously crashes. The application does not use GC, but the object is properly retained, so it's not that. Has anyone ever seen this before, and if so, what did you do to fix it?

Things I've already tried:

1. Running with Guard Malloc turned on (Guard Malloc finds no problems) 2. Running the X86-64 version of the app in addition to the usual X86 version 3. Running with zombies on (the object is not a zombie)

I haven't yet tried running it under PPC or PPC64.

Nick Zitzmann
<http://www.chronosnet.com/>

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