On Feb 8, 2013, at 5:05 AM, Oleg Krupnov wrote:

> I've received a few reports from users that my app hangs and consumes
> 100% CPU, and they have to force quit it. It usually happens on
> MacBooks after they are awaken from sleep mode.
> 
> One user also sent the following crash report:
> 
> 16  com.apple.CoreFoundation            0x00007fff8846547a
> _CFXNotificationPost + 2554
> 17  com.apple.Foundation                0x00007fff85251846
> -[NSNotificationCenter postNotificationName:object:userInfo:] + 64
> 18  com.apple.AppKit                    0x00007fff8cb8821e -[NSView
> _postFrameChangeNotification] + 259
> 19  com.apple.AppKit                    0x00007fff8cb728f3 -[NSView
> setFrameSize:] + 1352
> 20  com.apple.AppKit                    0x00007fff8cc47c86
> -[NSTextView(NSPrivate) _setFrameSize:forceScroll:] + 1367
> 21  com.apple.AppKit                    0x00007fff8cc13d33
> -[NSTextContainer setContainerSize:] + 193
> 22  com.apple.AppKit                    0x00007fff8cc43ac9
> -[NSTextContainer(NSPrivate) _resizeAccordingToTextView:] + 289
> 23  com.apple.CoreFoundation            0x00007fff8846547a
> _CFXNotificationPost + 2554
> 24  com.apple.Foundation                0x00007fff85251846
> -[NSNotificationCenter postNotificationName:object:userInfo:] + 64
> 25  com.apple.AppKit                    0x00007fff8cb8821e -[NSView
> _postFrameChangeNotification] + 259
> 26  com.apple.AppKit                    0x00007fff8cb728f3 -[NSView
> setFrameSize:] + 1352
> 27  com.apple.AppKit                    0x00007fff8cc47c86
> -[NSTextView(NSPrivate) _setFrameSize:forceScroll:] + 1367
> 28  com.apple.AppKit                    0x00007fff8cc13d33
> -[NSTextContainer setContainerSize:] + 193
> 29  com.apple.AppKit                    0x00007fff8cc43ac9
> -[NSTextContainer(NSPrivate) _resizeAccordingToTextView:] + 289

I just responded to an identical post in the dev forums, which I assume was 
yours <https://devforums.apple.com/message/783296#783296>:

See the last paragraph from Text System Storage Layer Overview: Tracking the 
Size of a Text View:
https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/TextStorageLayer/Tasks/TrackingSize.html

> Note that a text view can be resized based on its text container, and a text 
> container can resize itself based on its text view. If you set both objects 
> up to resize automatically in the same dimension, your application can get 
> trapped in an infinite loop. When text is added to the text container, the 
> text view is resized to fit the area actually used for text; this causes the 
> text container to resize itself and relay its text, which causes the text 
> view to resize itself again, and so on ad infinitum. Each type of size 
> tracking has its proper uses; be sure to use only one for either dimension.

Cheers,
Ken


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