This is all hypothetical (in Rust), because there&#x27;s no implementation. However, I would think that per-module enabling would be sticky, disregarding any call&#x2F;use-sites: a module defining a hash function would say that overflow is OK&#x2F;expected, and it would be incorrect for someone else to externally decide it is an error. (This also seems to be the only thing that is consistent: what if it is used from two modules with different options?)