Code in book doesn't crash application - disregard

I am using Xcode version 8.3.3. The very first “bug” in “Interpreting console messages” doesn’t crash the application. This is the example that has you change UIButton to UISwitch without updating the interface in Main.storyboard.

Please disregard this post. I didn’t fully implement the change described in the book. The bug occurs as expected. :-b