[jakobnissen]

That's not right, Rust only checks for overflow in release mode for numbers where its value is known at compile time. In debug mode all operations are checked for overflow.

[estebank]

Integer overflows can be enabled in release mode by modifying your Cargo.toml with

    [profile.release]
    overflow-checks = true

IMO it should have been the default.

[FridgeSeal]

Aahh, my bad. TIL.