On Apr 25, 2014, at 3:32 PM, Kyle Sluder <k...@ksluder.com> wrote:

> On Fri, Apr 25, 2014, at 12:20 PM, edward taffel wrote:
>> i just noticed & i’m not sure in which seed it occurred: NSScroller seems
>> to have undergone some revision. i now get this message:
>> 
>> CoreAnimation: warning, deleted thread with uncommitted CATransaction;
>> created by:
>> 0   QuartzCore                          0x00007fff96328ff6
>> _ZN2CA11Transaction4pushEv + 312
>> 1   QuartzCore                          0x00007fff96328b29
>> _ZN2CA11Transaction15ensure_implicitEv + 273
>> 2   QuartzCore                          0x00007fff963289c6
>> _ZN2CA11Transaction9set_valueEj12_CAValueTypePKv + 40
>> 3   QuartzCore                          0x00007fff9632895a
>> +[CATransaction setDisableActions:] + 38
>> 4   AppKit                              0x00007fff94005985
>> -[NSScrollerImp _updateLayerGeometry] + 68
>> 5   AppKit                              0x00007fff94004f52
>> -[NSScroller(NSInternal2) _replaceScrollerImp] + 401
>> 6   AppKit                              0x00007fff94164647 -[NSScroller
>> initWithFrame:] + 391
>> ...
>> 
>> the message is logged about 10 seconds after launch, once for the
>> vertical scroller only; the scroller looks & behaves as expected. both
>> scrollers are programmatically added (not in ib).
>> 
>> does anyone have any idea what the issue is? 
> 
> Often times this happens if an instance of a layer-backed NSView (of
> which NSScroll is an example) is deallocated on a background thread.
> 
> Ensure that the last reference to your views is always released from the
> main thread.
> 
> --Kyle Sluder

thanks kyle,

if this were the case, i should expect to see the same report for both 
scrollers; as they are allocated & released at the same code points, & i don’t 
pass the references around. but, i’ll do some checking to be sure.

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