// 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

{struct d<T where g:b{struct S{class b{protocol A{struct Q<a{{}}}class B{class d{let b:T:func f:A
