`arrayref` 0.3.10 was removed from crates.io due to a malicious dependency

A new version of the `arrayref` crate was published with a direct dependency
on `proc-macro1`, which would execute a malicious build script.

This compromised version was published on 2026-08-20 and removed approximately
86 minutes later. It was downloaded 2,285 times, which constituted less than
10% of `arrayref` download traffic across all versions, as most users had older
versions of `arrayref` in their lockfiles.