How to detect where NaN is passing to CoreGraphics API on Mac OS X 10.9

Question

I have very large graphic Mac app and now I receive a lot of the following messages in Console on 10.9 GM.

: Error: this application, or a library i         


        

Answer 1

After much digging around, I've found you can set a symbolic breakpoint on "CGPostError" in Xcode, and that will give you a stack trace.