Task execution order guarantees when targeting MainActor

Using Swift
,
9

But the following code's result showed otherwise:

@MainActor
func test() async {
    // job A
    print("a")

    Task { @MainActor in
        // job B
        print("b")
    }

    // job C
    print("c")
}

await test()
try? await Task.sleep(for: .seconds(1))

// Output:
// a
// c
// b

Compiler explorer: Compiler Explorer

I think the actual behavior is consistent with what @ktoso said in another thread: Possibility of synchronous Task body execution - #10 by ktoso.