@available(SwiftStdlib 5.1, *) @rethrows public protocol AsyncIteratorProtocol { associatedtype Element /// Asynchronously advances to the next element and returns it, or ends the /// sequence if there is no next element. /// /// - Returns: The next element, if it exists, or `nil` to signal the end of /// the sequence. mutating func next() async throws -> Element? }

↑さらに、rethrowsじゃなくてthrowsって書いてあるんだけど・・・ (edited)