Rust (clean) is actually perfectly safe to eat! And can add extra iron content to your diet if necessary! https://van.physics.illinois.edu/ask/listing/12540

https://www.prevention.com/food-nutrition/healthy-eating/a20457846/is-using-rusty-cookware-really-that-big-of-a-deal/

(Most sources assume tainted rust, or large quantities, but small amounts of “clean” rust are fine, just don’t over eat iron quantities)