I was recently scanning for newer, more-batteries-included options and this looks well-scoped at first bluff. Thanks for spreading it, might end up in my next experiment!
And then this shows up.
https://github.com/rust-lang/rust/issues/164348#issuecomment...
A bug as careless as can be. Relying wantonly on hashing for equality checking, without even wondering about the specific hash's collision probability.