Re: NSView viewWillDraw crash

FROM : Bill Bumgarner
DATE : Thu Jan 10 22:22:55 2008

On Jan 10, 2008, at 1:13 PM, Keith Duncan wrote:
> I've just caught a crash in NSView's viewWillDraw method, stack 
> backtrace below, note that none of my views implement this method. 
> I'm trying to think of an instance in which a crash could happen 
> without having overidden the method?
>
> I'f no-one can think of anything I'll just have to file a bug.
>
> - Keith
>
> #0  0x915f15e4 in CFRelease ()
> #1  0x91581343 in __CFArrayReleaseValues ()
> #2  0x915f17c8 in _CFRelease ()
> #3  0x9381f86a in -[NSView viewWillDraw] ()


It indicates that some view was likely removed from the view hierarchy 
while that particular thread was trying to figure out what views will 
need drawing.

While the backtrace doesn't pass through your code, you cannot 
conclude that it isn't a bug in your code.  In particular, are you 
manipulating the view hierarchy -- removing views from it -- from 
another thread or in any "figure out the rect that needs to be 
refreshed" code?

b.bum