This post is an opportunity to share some thoughts I’ve had about soundness, Rust, and open source community.

I believe one of the most important contributions of Rust is the cultural ideal of perfect soundness: that code using a sound library, no matter how devious, is unable to trigger undefined behavior (which is often thought of in terms of crashes but can be far more insidious). Any deviation from this is a bug. The Rust language itself clearly subscribes to this ideal, even as it sometimes falls short of attaining it (at this writing, there are 44 I-unsound bugs, the oldest of which is more than 6 years old).

source: L