// RUN: not %target-swift-frontend %s -parse
// REQUIRES: asserts

// Distributed under the terms of the MIT license
// Test case submitted to project by https://github.com/practicalswift (practicalswift)
// Test case found by fuzzing

var f: d {
protocol a {
}
struct S<T! {
}
extension NSSet {
}
let d<T: P {
protocol a = {
typealias R = F>) {
}
protocol d = {
}
}
}
class func a(n: C {
}
protocol P {
struct e = {
}
let i: d {
}
typealias e : e = D> {
}
var b: Int
