One of the most frustrating parts of rust (for me), is that `std::cmp::min` (and some other methods) require that their arguments are `Ord` (totally ordered), and floats are only partially order because of NaN, so you can't use std::cmp::min on floats.
I do believe that's quite intentional, due to the inexactness of floating-point values, it's not "right" to do that. There should be a `partial_min` function though, IMO, which has weaker guarantees.
Safety is the whole idea behind Rust, and if you draw the line here, that's neither in line with the Rust ethos, nor particularly valuable. After all, code that "expects to handle" null was pretty rare too ;)
