Comment by tialaramex

> It's not going to find any in a memory safe language.

I mean, it's not supposed to find any in the unsafe language either, but that's why it was used.

Firefox not only uses unstable Rust features (via the exemption mechanism the same way Linux does it, trained professionals, closed course, do not attempt at home) it also presumably has some volume of its own explicitly unsafe Rust and so there's no reason this could not be checked, and what makes the difference here is whether it was or was not.