Post #233847 770 Oct 13, 2026, 10:59 UTC 11 year old unsoundness bugs found in Rust borrow checkerArticle, Comments GitHub struct's lifetime requirements can be bypassed via covariant field assignment · Issue #164250 · rust-lang/rust In the following code: use std::sync::Mutex; static KEPT: Mutex<Vec<Box<dyn std::any::Any + Send>>> = Mutex::new(Vec::new()); struct Q<T: 'static + Send>(Option<T>... 🤣 14 🔥 2 😁 1 💅 1