exit status: 1 with stderr:
<stdin>:2:7: error: class 'OneValue' has no initializers class OneValue { var x: Int } ^ <stdin>:2:22: note: stored property 'x' without initial value prevents synthesized initializers class OneValue { var x: Int } ^ = 0 <stdin>:5:16: error: 'OneValue' cannot be constructed because it has no accessible initializers let oneValue = OneValue(x: 0) ^~~~~~~~