Details
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Type:
Bug
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Status: Open
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Priority:
Medium
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Resolution: Unresolved
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Component/s: Compiler
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Labels:None
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Environment:
macOS 10.12.4, Xcode 8.3.1
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Radar URL:
Description
Given a function f that takes Any in one of its parameters, passing self in a call to f is allowed in a closure that initializes a let property.
The compiler should raise an issue for using self before all stored properties are initialized and the issue should disappear when the property is transformed to a lazy var. But the current behavior is that self is casted as func `self`() -> Self and the compiler does not complain.
The following code reproduces the issue:
import UIKit class A: NSObject { private let control: UIControl = { print("I'm not lazy") let control = UIControl() control.addTarget(self, action: #selector(valueChanged), for: .valueChanged) print(self) // prints "(Function)" doSomething(with: self) return control }() @objc private func valueChanged() { } } func doSomething(with a: Any) { print("called 'Do Something'") } A()
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