"informing without blocking can be useful to allow rapid progress, but if any phase ever decides to inform, some later phase must block on the same thing to ens

"informing without blocking can be useful to allow rapid progress, but if any phase ever decides to inform, some later phase must block on the same thing to ensure the problem doesn't stick around" In Rust, #![deny(warnings)] is consider bad practice for the reasons explained in this article - it blocks progress too early. Rather setting RUSTFLAGS="-D warnings" in CI will easily prevent warnings from being committed.