I'm experiencing weird crash in NSOutlineView: when i click "collapse" button, app crashes immediately and even "exception breakpoint" doesn't help to see where the problem is.
I've tried to run app without debugger, and reproduced the problem. Once app crashed, i've got OSX crash window and was able to extract crash message from there:
The window has been marked as needing another Update Constraints in Window pass, but it has already had more Update Constraints in Window passes than there are views in the window
there also call stack, but it won't help since crash happening inside libsystem_c.dylib, so i'm not posting it here.
It seems there is something wrong going with auto layout. Absolutely have no idea about next steps. Please give me an advice!
Also, one more thing, that began only after update to OSX Mojave.
After hours of debugging and testing, i noticed that that message is caused by "infinite layout loop".
Different code, related to outline view was causing NSSplitView to layout. And delegate method - (CGFloat) splitView:(NSSplitView*)sender constrainMinCoordinate:(CGFloat)proposedMinimumPosition ofSubviewAt:(NSInteger)dividerIndex has been called about 200 times prior to crash.
It's hard to catch this bcs it's not actually infinite recursion, so just debugger doesnt help a lot. I just added simple code that helped me to identify the issue:
static int a = 0;
NSLog(@"Layout: %d", a++);
Hope my experience will help somebody else!