Huh? Parent wrote: >> Rust wraps in release mode and traps in debug mode You wrote: > In release mode, the behavior of integer overflow in Rust is not UB/can

Huh? Parent wrote: >> Rust wraps in release mode and traps in debug mode You wrote: > In release mode, the behavior of integer overflow in Rust is not UB/cannot happen, but modulo two arithmetic. The parent didn't claim or imply that overflow is UB. The parent wrote that it "wraps", which is equivalent to your "modulo two arithmetic". You are not in disagreement, so why are you disagreeing?