Enable overflow checks in release build

[tzemanovic]

The arithmetic operators have different default behavior in debug (checked, panic on overflow) vs release build (unchecked, wrapping).

We should enable overflow-checks by default in release build as it’s a safer thing to do in our settings and the added cost is worth it.

https://doc.rust-lang.org/reference/expressions/operator-expr.html#overflow

[sug0]

I guess this makes overflowing_* function calls mostly obsolete then, right?

[tzemanovic]

I guess this makes overflowing_* function calls mostly obsolete then, right?

I don't think it does - it's more like combination of checked_ + unwrap. Imho it's still preferable to use explicit checked_/wrapping_/overflowing_ arithmetic over the operators, but this config at least ensures the same behavior in debug and release for when they're used