Re: Triggering an NSTextStorage Bug
Re: Triggering an NSTextStorage Bug
- Subject: Re: Triggering an NSTextStorage Bug
- From: Seth Willits <email@hidden>
- Date: Tue, 19 Mar 2013 21:36:20 -0700
I haven't tried with Instruments, just NSZombieEnabled. I take it you do see the crash without Instruments?
--
Seth Willits
On Mar 19, 2013, at 6:09 PM, Kyle Sluder wrote:
> Bizarrely, running your sample project in under the Zombies Instrument
> produces no crash, but it _does_ spin the pinwheel forever during
> startup, creating infinitely many instances of NSDictionary.
>
> --Kyle Sluder
>
> On Tue, Mar 19, 2013, at 04:54 PM, Seth Willits wrote:
>>
>> This has taken me a *very long time* to narrow down to its simplest bits
>> and it's very puzzling to me.
>>
>>
>> The short story is I have an NSTextStorage subclass as I'm doing many
>> different things, syntax coloring among them. I would swear that
>> everything I'm doing is a legitimate implementation, but there is
>> obviously something causing internal behavior in the text system to go
>> haywire. The result is that the text system itself (not me!) is
>> over-releasing the NSParagraphStyle. The memory management in my code is
>> solid, so the problem has to be in the text system itself.
>>
>> The example project:
>> http://www.sethwillits.com/temp/PGSOverRelease.zip
>>
>> There are a number of factors involved in reliably reproducing this
>> behavior and this project has one set of circumstances that will
>> reproduce it, but there are others. If you slightly change any of these
>> factors (all changes which should have no effect), then the over-release
>> crash does not occur.
>>
>> I have read and re-read all of the text storage documentation multiple
>> times and I am thusly confident that either some critical elusive
>> behavior is undocumented or I've found a legitimate bug in the text
>> system.
>>
>>
>> Any help would be greatly appreciated. This is severely impacting my work
>> at the moment.
>>
>>
>> --
>> Seth Willits
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