// This source file is part of the Swift.org open source project
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors

// RUN: not %target-swift-frontend %s -typecheck
class j {
    class func dc() -> String {
    ed(b: l) {
   }
}
q j {
}
class k<n> {
    ed <j: j where j.w == n>(n: j.w) {
    }
}
class j {
    func hg: (j, u) -> u) -> (j, u) -> u {
	}
	func x() {
	}
}
v y {
    i ed(o: p) {
    }
}
struct y<x : n, hg: n where hg.r == x.r> {
func dc
