Comment by brabel

Bugs like these are pervasive in languages like Java that give no protection against even the most basic race condition causes. It’s nearly impossible to write reliable concurrent code. Freya only helps if you actually use it to test everything which is not realistic. I am convinced, after my last year long struggle to get a highly concurrent Java (actually Kotlin but Kotlin does not add much to help) module at work, that we should only use languages that provide safe concurrency models, like Erlang/Elixir and Rust, or actor-like like Dart and JavaScript, where concurrency is required.