> On 26 Aug 2014, at 12:40 am, Howard Moon <how...@antarestech.com> wrote:
> 
> Ok, I fixed it. I was using the connection object as a member of my class, 
> and releasing that, when I should have been releasing the connection that is 
> given to me inside didFailWithError and connectionDidFinishLoading, not 
> making it a member at all.
> 
> Regards,
>       Howard

That didn’t sound quite right, either way Jens followed up with some rules 
which did sound right. 

I’m not entirely sure this crash is down to you nor that it’s calling any 
methods on your correctly deallocated instance of NSURLConnection or the 
delegate. To me it looks like the HTTP cache subsystem is purging data and 
tripping over itself because of something it cleaned up when the 
NSURLConnection was closed earlier, perhaps a weak NSURL pointer it had to a 
temporary file which it nil’ed or similar, or a bug in the HTTP cache system 
when plugins using it are unloaded which yanks out data it’s going to access 
later. 

Do you still get the crash if you change your cache policy? Not that you 
necessarily can change it for your app, just a question of trying to narrow 
down where the error is coming from. You could also perhaps implement some of 
the URL cacheing callbacks on the delegate to try and circumvent the OS trying 
to store data, not sure that has too much mileage in it. 

This starts to look to me more like a framework bug than your own. 
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