// 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

class B<T where T:T{enum S<T{class B{
class A{
class a{
struct A{
class A{
var d
func a{
class A{
class A:B
