Hello. I want to solve task "Design Circular Queue " with Swift. When I am trying to run default code, I get compile error. So, I am trying to run my own code and I get same error. But my code works fine on your debug playground and also on xcode playground. Compiler always says about (myLastRow + 8 rows) error. But i have not code on this row. Try to compile default code and you will see this problem.