Re: Nil Object Crashing KVO
Re: Nil Object Crashing KVO
- Subject: Re: Nil Object Crashing KVO
- From: Gordon Apple <email@hidden>
- Date: Sun, 24 Aug 2008 11:58:56 -0500
- Thread-topic: Nil Object Crashing KVO
10.5.4, MacBookPro 2.4 GHz Intel Core 2 Duo. Only console message is
Program received signal: ³EXC_BAD_ACCESS².
#0 0x9595c6e8 in objc_msgSend
#1 0x924415d3 in _NSValueOfClassWithSpecialSpecificErrorMessage
#2 0x924410b4 in -[NSArrayDetailBinder
_refreshDetailContentInBackground:]
#3 0x920080ce in NSKVONotify
#4 0x91f84702 in -[NSObject(NSKeyValueObserverNotification)
didChangeValueForKey:]
#5 0x0000f9be in -[RTPDisplayController updateShotAndLayer] at
RTPDisplayController.m:314
#6 0x0001106b in -[RTPDisplayController awakeFromNib] at
RTPDisplayController.m:539
On 8/24/08 11:29 AM, "Ken Thomases" <email@hidden> wrote:
> On Aug 24, 2008, at 9:00 AM, Gordon Apple wrote:
>
>> I¹m having a problem that only shows up in Release mode. I have an
>> object that should have ³editLayer² ivar automatically initialized
>> to nil.
>> A second object has a KVO on this ivar property. When the first
>> object
>> calls setEditLayer (as a result of it¹s own KVO notification
>> observation
>> from elsewhere), the program crashes before the second object
>> receives its
>> KVO, but only in release mode.
>
> Crashes how -- with what kind of signal or kernel exception code?
> Also, is anything logged to the console when the crash happens (or
> just before)? What's the backtrace?
>
> Also, on what OS version are you running?
>
> Without details such as those, it's kind of hard to respond to these
> debugging queries.
>
> -Ken
G. Apple
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