These were taken from the 6.7.4 release and 6.8.0 betas. They seem to be related to updating views on threads other than main.
Binary: TopReadWidget
UIKitCore: -[UIImageView _mainQ_beginLoadingIfApplicable] + 72
UIKitCore: -[UIImageView _mainQ_beginLoadingIfApplicable] + 76
CoreAutoLayout: _AssertAutoLayoutOnAllowedThreadsOnly + 416
CoreAutoLayout: _AssertAutoLayoutOnAllowedThreadsOnly + 412