Update on email delays:  Greg, sorry it took so long to reply this; I was 
waiting to see if your email would arrive.  Although I have definitely been 
foiled by delays of several hours on this list for many months, it appears that 
the even-longer delays I saw last week were due to IEEE mail servers in New 
Jersey being hit by Hurricane Sandy.

* * *

On 2012 Nov 03, at 16:28, Greg Parker <[email protected]> wrote:

> If you build with the 10.8 SDK, and your deployment target is 10.8 or later, 
> then dispatch objects and XPC objects become Objective-C objects. If you use 
> ARC then they are ordinary ARC-managed objects and you do not retain and 
> release them yourself.
> 
> You can temporarily revert to the old behavior by defining 
> OS_OBJECT_USE_OBJC=0.

Yes, setting setting -DOS_OBJECT_USE_OBJC=0 in the Compiler Flags of the file 
calling xpc_release(), which is compiled with ARC, fixed the problem.

> Going forward the solution is to remove your manual retain/release calls and 
> let ARC do the work.

Are you saying that if a file is compiled with ARC, I should delete calls to 
xpc_release()?  Read on…

> You might try re-running the ARC migrator on your ARC code and see if it 
> catches them.

The little project was written with ARC from the ground up.  So I just ran Edit 
▸ Convert to Objective-C ARC on it, and  was told that "No source file changes 
are necessary".  The call to xpc_release() was not noticed.

So, neither the xpc_release() documentation, nor the ARC migrator indicate that 
I should remove the call to xpc_release().  Are they both missing the boat?


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