In Rust overflows generally will cause a panic. So "2 + 2" will return 4 or panic if you're on a 2-bit system (they provide .saturating_add() and .wrapping_add() to get code that will never panic)
Thus, you could have caused a denial of service by crashing a rust-based Curl, but the crash would have been modeled and just uncaught.
Thus, you could have caused a denial of service by crashing a rust-based Curl, but the crash would have been modeled and just uncaught.