[swift-users] Lazy expression is ambiguous?

[Rick Mann]

I get this error in the following code: "Type of expression is ambiguous without more context", on the DispatchQueue. But only if I mark it as "lazy", and not if I don't. I'm not sure why.

class
myClass
{
  lazy var myQ = DispatchQueue(label: "Op", attributes: .concurrent)	// <-- ERROR
                 ^Type of expression is ambiguous without more context
}

Would someone please explain? Thank you.

-- 
Rick Mann
rmann at latencyzero.com