“await” is needed to access a variable within an actor when using a Task with optional self

[LeeKahSeng]

Description

actor MyActor {
    
    private var name = ""
    
    func printName() {
        
        // Task 1
        Task {
            print(name)
        }
        
        // Task 2
        Task { [weak self] in
            // Error: Expression is 'async' but is not marked with 'await'
            print(self?.name ?? "")
        }
    }
}

Referring to the code above, Task 1 compiles successfully, whereas Task 2 encounters a compile error.

Expected behavior
The optional self in Task 2 should not foul the analysis

Environment

• Xcode 14.3
• Swift 5.8

[grynspan]

This is at least nominally correct. Imagine what would happen if you executed this code, but self became nil before the unstructured task began to execute:

Task { [weak self] in
  print(self?.name ?? "")
}

How can you guarantee isolation to self if self could be nil?

[LeeKahSeng]

If self has become nil, is isolation still needed?

By the way, I have posted the question on the Swift Forum, feel free to take a look for more context.

[wiruzx]

Duplicate of #62604?