You can pass "-C overflow-checks=on" to rustc to generate an optimized build with over/underflow checks enabled, even in a release build. Also, note that over/u

You can pass "-C overflow-checks=on" to rustc to generate an optimized build with over/underflow checks enabled, even in a release build. Also, note that over/underflow behavior is defined to always be two's compliment wrapping when overflow checks are disabled.