Re: NSInvocation crashes in AutoreleasePool
Re: NSInvocation crashes in AutoreleasePool
- Subject: Re: NSInvocation crashes in AutoreleasePool
- From: Greg Parker <email@hidden>
- Date: Wed, 22 Oct 2014 14:31:46 -0700
> On Oct 22, 2014, at 12:04 PM, Gerriet M. Denkmann <email@hidden> wrote:
>
>> On 23 Oct 2014, at 01:37, Scott Ribe <email@hidden> wrote:
>>
>> On Oct 22, 2014, at 12:19 PM, Jonathan Mitchell <email@hidden> wrote:
>>>
>>> Surely the code that returns the object pointed to by temp has to ensure that the object has been correctly retained?
>>
>> So, maybe __autorelease?
>
> Tried:
> [ iv invoke ];
> NSDictionary * __autoreleasing a;
> [ iv getReturnValue: &a ];
>
> Result: no crash.
>
> So, indeed, __autoreleasing seems to be the answer.
> ( __autoreleasing is used to denote arguments that are passed by reference (id *) and are autoreleased on return.)
__autoreleasing is not correct, although it might happen to work today. __autoreleasing means the value stored in the variable is autoreleased. -getReturnValue: does not autorelease the value it stores, so the annotation does not match the behavior.
The annotation that matches the behavior is __unsafe_unretained. Use that instead.
--
Greg Parker email@hidden Runtime Wrangler
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