On Tue, 20 Sep 2016 14:26:27 -0700, David Duncan said:

>> On Sep 20, 2016, at 1:21 PM, Sean McBride <s...@rogue-research.com> wrote:
>> Hi all,
>> WWDC 2016 Session 203 "What's New in Cocoa" at around 43:37 in the
>video, says that if you link against the 10.11 SDK that NSTableView's
>delegate is weak.  So I went and wrapped my delegate nil-ing in:
>>      [tableView setDelegate:nil];
>>      [tableView setDataSource:nil];
>> #endif
>> yet (with NSZombie especially), I easily reproduce message-to-zombie
>crashes with builds that are made against the Xcode 7.3.1 10.11 SDK.
>On which OS version?

At runtime: 10.9.5, 10.10.5, and 10.11.6.

>The macro above only says “do this if I link against an SDK prior to
>10.11” – that doesn’t handle what happens at runtime when you are on
>10.10 or below. In particular, if you plan to deploy back to prior to
>10.11, then you would want to either do a runtime check, or for trivial
>code like this always run the code until your MIN_ALLOWED (deployment
>target) is >= 10.11.

Yes, I'm aware of these differences.  I'm also aware, as you surely are, that 
sometimes behaviour depends (only) on what SDK you link against.

If you scrub to around 43:37 here:

you'll see they specifically refer to "linked on 10.11".

Besides, I both build and run on 10.11.6 and yet I see these message-to-zombie 
crashes after removing the setDelegate:nil code.


Sean McBride, B. Eng                 s...@rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada


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