Build error: 'required' initializer 'init(arrayLiteral:)' must be provided by subclass of 'NSSet'

Is this restricted to the project you just converted? Or does it happen if you create a new project from one of the built-in templates?

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I have same issue on converted project:

<unknown>:0: error: 'required' initializer 'init(arrayLiteral:)' must be provided by subclass of 'NSSet'
Foundation.NSSet:2:33: note: 'required' initializer is declared in superclass here
    required public convenience init(arrayLiteral elements: Any...)
                                ^
<unknown>:0: error: 'required' initializer 'init(integerLiteral:)' must be provided by subclass of 'NSNumber'
Foundation.NSNumber:2:42: note: 'required' initializer is declared in superclass here
    @nonobjc required public convenience init(integerLiteral value: Int)
                                         ^
<unknown>:0: error: 'required' initializer 'init(floatLiteral:)' must be provided by subclass of 'NSNumber'
Foundation.NSNumber:3:42: note: 'required' initializer is declared in superclass here
    @nonobjc required public convenience init(floatLiteral value: Double)
                                         ^
<unknown>:0: error: 'required' initializer 'init(booleanLiteral:)' must be provided by subclass of 'NSNumber'
Foundation.NSNumber:4:42: note: 'required' initializer is declared in superclass here
    @nonobjc required public convenience init(booleanLiteral value: Bool)

shows for that and 132 another classes:

class DRTogglMenuEvent: DREvent {
}

class DREvent {
    var error: NSError?
}

I do not create DRTogglMenuEvent object but have error.

any ideas?