Filed as rdar://28800764.
This project reproduces an issue with setting a custom inset inside of
layoutSubviews on the table view cell subclass.
Given a UITableViewCell subclass sets a custom separatorInset value in it's
layoutSubviews method, in this example called CustomInsetCell, and a
UITableView displaying the cell has cellLayoutMarginsFollowReadableWidth set
to true, upon rotating the table view, an infinite set of calls to
CustomInsetCell.layoutSubviews() occurs, due to the method setting the
separatorInset.
The table view handles rotation, maintaining the custom separatorInset value.
The application freezes upon rotation due to infinite calls to
CustomInsetCell.layoutSubviews()