Key points:

• Integer overflow is defined via the overflow-checks compile-time flag. If enabled, the program will panic (a controlled crash of the program), otherwise you get wrap-around semantics. By default, you get panics in debug mode (cargo build) and wrap-around in release mode (cargo build --release).

• Bounds checking cannot be disabled with a compiler flag. It can also not be disabled directly with the unsafe keyword. However, unsafe allows you to call functions such as slice::get_unchecked which does not do bounds checking.