Re: Crash in CGDisplayCurrentMode()

FROM : Nigel Pearson
DATE : Tue Apr 19 01:08:22 2005

Hi Tim. Thanks for the response.

>  My guess would be that the display mode dictionary
> is getting deallocated and you are hitting a zombie.


   Possible, but why would the CoreGraphics library code be
deallocating the dictionary that it is meant to return to me?

(check the stack trace - it is crashing _in_ the CGDisplayCurrentMode()
call)


   The really freaky thing? I tried running it today with
MallocStackLogging=1 set in the environment. No crash
(though it was a lot slower). So I try it without that.
Also no crash. F*^&#ng non-deterministic code :-(


...
> Note, it isn't clear to me that you are _ever_ supposed
> to release the result of CGDisplayCurrentMode.


   Correct, it is a reference to a CG private data structure.


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