In a Core Data-based app that works fine in 10.5.x, I now get an
exception as follows in 10.6 when opening a document. It targets
10.5, and the same exception occurs when rebuilding on 10.6 (still
targeting 10.5, but also when targeting 10.6).
I don't register or unregister any observers myself, and the exception
occurs without touching any of my code. What's going on?
NSRangeException: Cannot remove an observer <NSKeyValueObservance
0x15476c0> for the key path "richText" from <TextEntity 0x1546380>
because it is not registered as an observer.
1 +[NSException raise:format:arguments:] (in CoreFoundation) +
136
2 +[NSException raise:format:] (in CoreFoundation) + 58
3 -[NSObject(NSKeyValueObserverRegistration)
_removeObserver:forProperty:] (in Foundation) + 765
4 -[NSObject(NSKeyValueObserverRegistration)
removeObserver:forKeyPath:] (in Foundation) + 176
5 -[NSKeyValueNestedProperty
object:didRemoveObservance:recurse:] (in Foundation) + 544
6 -[NSObject(NSKeyValueObserverRegistration)
_removeObserver:forProperty:] (in Foundation) + 453
7 -[NSObject(NSKeyValueObserverRegistration)
removeObserver:forKeyPath:] (in Foundation) + 176
8 -[_NSModelObservingTracker
_registerOrUnregister:observerNotificationsForModelObject:] (in
AppKit) + 228
9 -[_NSModelObservingTracker clearAllModelObjectObserving] (in
AppKit) + 341
10 -[_NSModelObservingTracker
setIndexReferenceModelObjectArray:clearAllModelObjectObserving:] (in
AppKit) + 51
11 -[NSArrayController _setObjects:] (in AppKit) + 196
12 -[NSArrayController
_arrangeObjectsWithSelectedObjects:avoidsEmptySelection:operationsMask:useBasis
:] (in AppKit) + 510
13 -[NSArrayController rearrangeObjects] (in AppKit) + 133
14 -[NSArrayController
observeValueForKeyPath:ofObject:change:context:] (in AppKit) + 338
15 NSKeyValueDidChange (in Foundation) + 377
16 -[NSObject(NSKeyValueObservingPrivate)
_didChangeValuesForKeys:] (in Foundation) + 565
17 _PFFaultHandlerFulfillFault (in CoreData) + 1921
18 _PFFaultHandlerLookupRow (in CoreData) + 1573
19 -[NSFaultHandler fulfillFault:withContext:] (in CoreData) + 39
20 _PF_FulfillDeferredFault (in CoreData) + 193
21 _sharedIMPL_pvfk_core (in CoreData) + 65
22 -[NSManagedObject(_PFDynamicAccessorsAndPropertySupport)
_genericValueForKey:withIndex:flags:] (in CoreData) + 79
23 -[NSManagedObject valueForKey:] (in CoreData) + 244
24 -[NSKeyValueNestedProperty object:didAddObservance:recurse:]
(in Foundation) + 240
25 -[NSObject(NSKeyValueObserverRegistration)
_addObserver:forProperty:options:context:] (in Foundation) + 812
26 -[NSObject(NSKeyValueObserverRegistration)
addObserver:forKeyPath:options:context:] (in Foundation) + 565
27 -[_NSModelObservingTracker
_registerOrUnregister:observerNotificationsForKeyPath:ofModelObject:]
(in AppKit) + 134
28 -[_NSModelObservingTracker
_registerOrUnregister:observerNotificationsForModelObject:] (in
AppKit) + 228
29 -[_NSModelObservingTracker _startObservingModelObject:] (in
AppKit) + 418
30 -[_NSModelObservingTracker
startObservingModelObjectsAtReferenceIndexes:] (in AppKit) + 333
31 -[NSArrayController
_arrangeObjectsWithSelectedObjects:avoidsEmptySelection:operationsMask:useBasis
:] (in AppKit) + 510
32 -[NSArrayController setContent:] (in AppKit) + 889
33 -[NSArrayController(NSManagedController)
_performFetchWithRequest:merge:error:] (in AppKit) + 501
34 -[NSObjectController(NSManagedController)
fetchWithRequest:merge:error:] (in AppKit) + 209
35 -[NSObjectController(NSManagedController)
_executeFetch:didCommitSuccessfully:actionSender:] (in AppKit) + 106
36 _NSSendCommitEditingSelector (in AppKit) + 339
37 -[NSController _controllerEditor:didCommit:contextInfo:] (in
AppKit) + 216
38 __invoking___ (in CoreFoundation) + 29
39 -[NSInvocation invoke] (in CoreFoundation) + 136
40 -[NSInvocation invokeWithTarget:] (in CoreFoundation) + 72
41 __NSFireDelayedPerform (in Foundation) + 537
42 __CFRunLoopRun (in CoreFoundation) + 6846
Hard to say without more details, but it does look like a Cocoa
Bindings bug. If you could create a new sample project with your NIB
and your model and reproduce this, and then attach it to a bug report,
that would be extremely helpful.
Thanks,
- Ben
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