| // RUN: not %target-swift-frontend -typecheck %s | |
| public protocol LocalizedError : Error { | |
| var errorDescription: String? { get } | |
| } | |
| public enum AFError: Error {} | |
| extension AFError { | |
| public var isInvalidURLError: Bool { | |
| extension AFError: LocalizedError { | |
| public var errorDescription: String? { | |
| return "" |