Ah, the infamous _NSKeyValueObservationInfoCreateByRemoving crash bug.
That's shown up with a number of triggers, and is definitely not
reproducible, nor is your code at fault. I filed a bug on it, and Jim
Correia (who often posts on this list) has sent in a reproducible case.
If you can figure out the interface item or binding that's triggering it,
you may be able to work around it. In my case, I was able to have an object
traverse a relationship for me, instead of binding through the relationship,
and that stopped the crashing.
JT
> I'm having a hard time tracking down a crash related
> [removeObserver:forKeyPath:]. Unfortunately the bug is not
> reproducable, I've only seen various crash logs looking like this one:
>
> 0 com.apple.CoreFoundation 0x9072dd84 CFRetain + 60
> 1 com.apple.Foundation 0x929094b0
> _NSKeyValueObservationInfoCreateByRemoving + 440
> 2 com.apple.Foundation 0x92909288 -[NSObject
> (NSKeyValueObserverRegistration) _removeObserver:forProperty:] + 56
> 3 com.apple.Foundation 0x92909178 -[NSObject
> (NSKeyValueObserverRegistration) removeObserver:forKeyPath:] + 436
> 4 com.mydomain.myapp 0x00077d2c -[GSTreeController
> removeItems:] + 368 (crt.c:300)
> 5 com.mydomain.myapp 0x00077b8c -[GSTreeController
> deleteItems:] + 32 (crt.c:300)
> 6 com.mydomain.myapp 0x00087808 -[GSAppController
> (ImageView) imageView:shouldDeleteObjects:] + 68 (crt.c:300)
> 7 com.mydomain.myapp 0x000868b8 -[GSImageView delete:] + 136
> (crt.c:300)
> 8 com.mydomain.myapp 0x0008697c -[GSImageView keyDown:] +
> 108 (crt.c:300)
> 9 com.apple.AppKit 0x936600d8 -[NSWindow sendEvent:] + 6424
> 10 com.apple.AppKit 0x93608bfc -[NSApplication
> sendEvent:] + 4172
> 11 com.apple.AppKit 0x93600090 -[NSApplication run] + 508
> 12 com.apple.AppKit 0x936f08bc NSApplicationMain + 452
> 13 com.mydomain.myapp 0x00002abc _start + 392 (crt.c:267)
> 14 com.mydomain.myapp 0x00002930 start + 48
>
> Since I've been hunting down this bug for quite some time now without
> success, maybe someone on this list can have a look at the code and
> point me to what I'm doing wrong.
>
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