// 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

{class B:Collection
a{
struct S{
class A{class b{
enum B:A
}}}}class B{
struct S{
{
{
}{}}
enum E<T where B:a{struct B{{}struct B<g{class B{class d{var _=B