// RUN: not --crash %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

protocol a{
{
}
typealias f
}
struct B<H:a{
class a<d{{
}struct B<a{
class c{
let f=b
func b
