CGContextClipToRects: invalid context 0x0.
CGContextClipToRects: invalid context 0x0.
- Subject: CGContextClipToRects: invalid context 0x0.
- From: Richard Charles <email@hidden>
- Date: Tue, 15 Dec 2015 16:12:42 -0700
I am trying to debug the following error.
<Error>: CGContextClipToRects: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
I have added a symbolic breakpoint on CGPostError. The application halts completely with Apple’s frameworks. There is not a single stack frame from my code except main.
The first few stack frames look like this.
#0 0x00007fff8e5686c7 in CGPostError ()
#1 0x00007fff8e568798 in handle_invalid_context ()
#2 0x00007fff8d5ad2c0 in -[NSView _drawRect:clip:] ()
The first thing I noticed is that there are no debug symbols in Apple’s frameworks. It that normal?
If there were debug symbols present I could query the NSView object to see what class it is to see how it relates to my code.
How do you debug something with no symbols?
--Richard Charles
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