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

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

b {
class A.advance() {
var d {
return { self] in
}
}
}
}
protocol d : a {
class A = {
}
func a(2