`Protocol 'TestProtocol' as a type cannot conform to the protocol itself` not appear Swift 5.7

[xwu (Xiaodi Wu)]

Weird behaviour with protocol conforming to itself

When I run the following extension code on macOS Monterey 12.6 with Xcode 14.0.1 in a playground, it compiles and runs fine. However when I run it on my laptop on macOS Big Sur 11.7 with Xcode 13.2.1 it gives me a compilation error saying "Protocol Encodable as a type cannot conform to the protocol itself". My project iOS deployment target is 15.2 Has something changed in recent version so that now this works? import SwiftUI extension URLRequest { init?(baseUrl: String, controller: Stri…