Testcase tests::index_hash_distribution fails

When running cargo test, I get the following failure: ``` ---- tests::index_hash_distribution stdout ---- thread 'tests::index_hash_distribution' panicked at src/lib.rs:659:13: 9474 deviates from 10000 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace ``` After investigating by using `git bisect` I triaged the issue to the following commit faa0fcf1922f77c38f5c0c9898ab30bbf85c939e, though it's unclear to me if the testcase in question should be expected to behave differently after changing the default hasher