> On Jul 12, 2017, at 9:34 AM, Jeremy Hughes <moon.rab...@virginmedia.com> 
> wrote:
> 
> // Prints "Why is childReference not nil?”

There may still be a reference in the autorelease pool. Check childReference 
again ‘later’, i.e. on the next user event or after a timer/delayed-perform.

—Jens
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