I just discovered a bug in my app that is always reproducible in
10.5.7, and non-existent in 10.5.6. Wondering if anyone else has come
across this.
Application uses: CoreData with bindings, NSTreeController with an
NSOutlineView.
Steps to reproduce: outline view has a top level object with one or
more child objects.
- Add another child object to the existing parent.
- Crash... (stack trace below is with zombies enabled)
Console log:
2009-05-16 22:21:14.040 MyApp[331:813] *** -[NSTreeControllerTreeNode
representedObject]: message sent to deallocated instance 0xfae69b0
Stack trace:
#0 0x94241867 in ___forwarding___
#1 0x94241972 in __forwarding_prep_0___
#2 0x93c0ce4c in -[NSTreeController
observeValueForKeyPath:ofObject:change:context:]
#3 0x92b032ee in NSKVONotify
#4 0x92b032ee in NSKVONotify
#5 0x92a7f5e2 in -[NSObject(NSKeyValueObserverNotification)
didChangeValueForKey:]
#6 0x91982ac7 in -[NSManagedObject didChangeValueForKey:]
#7 0x919813b2 in _sharedIMPL_setvfk_core
#8 0x91983c13 in -[NSManagedObject setValue:forKey:]
#9 0x00004f65 in -[Analysis setDoubleValue:forKey:] at Analysis.m:323
#10 0x00058371 in -[AnalysisCache
copyResultsToAnalysis:forManualSegment:] at AnalysisCache.mm:296
#11 0x00019357 in -[CacheTask taskCompleted:] at CacheTask.m:98
#12 0x00018c82 in -[TaskDispatcher taskCompleted:] at TaskDispatcher.m:
180
#13 0x00018e91 in -[TaskDispatcher handlePortMessage:] at
TaskDispatcher.m:216
#14 0x92abce93 in __NSFireMachPort
#15 0x9419e1c5 in __CFMachPortPerform
#16 0x941c2888 in CFRunLoopRunSpecific
#17 0x941c2c78 in CFRunLoopRunInMode
#18 0x945ac28c in RunCurrentEventLoopInMode
#19 0x945abfde in ReceiveNextEventCommon
#20 0x945abf19 in BlockUntilNextEventMatchingListInMode
#21 0x93608d0d in _DPSNextEvent
#22 0x936085c0 in -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:]
#23 0x936015fb in -[NSApplication run]
#24 0x935ce834 in NSApplicationMain
#25 0x000066d6 in main at main.m:25
The release build seems to crash when a representedObject message is
sent to some non-NSTreeNode object such as a NSCFSet or NSFetchRequest
(the exact object receiving this message varies from trial to trial).
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