I’ve been adding more integration tests for Fray recently. To ensure Fray can handle different scenarios, I wrote many creative test cases. Many of them passed as expected, while some failures led to epic fixes in Fray. Then something unexpected happened: Fray threw a deadlock exception while testing the following seemingly innocent code: 1private void test() { 2 ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1); 3 // Shutdown thread. 4 new Thread(() -> { 5 ...