Another day, another Xcode beta.

IDE & Playgrounds

• You can now set Swift Error breakpoints, including restricting the breakpoint to specific error types.
• The in-playground API has been revamped. XCPlaygroundPage.currentPage now grants a reference to the current page.
• The playground live view support has been enhanced. Types can adopt XCPlaygroundLiveViewable to return a custom view or view controller that can represent the type. This has huge potential to make playgrounds super interactive.

Bugs

• No more crashing when compiling with optimizations and debug info enabled
• Checking for protocol conformance with as? under whole-program optimization works now
• No more crashing when accessing imported Objective-C block properties that return NSArray