Been encountering this error a lot in my OS X using swift:

“This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes. This will cause an exception in a future release.”

I have a my NSWindow and I’m swapping in views to the contentView of the window. I get the error when I try and do a NSApp.beginSheet on the window, or when I add a subview to the window. Tried disabling autoresize stuff, and I don’t have anything using auto layout. Any thoughts?

Sometimes it’s fine and nothing happens, other times it totally breaks my UI and nothing loads

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