// 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 d<T{class B{struct Q{struct Q{class a{class a{class c<T where g:C{struct d<f{{}class B:a
