The anymap crate does not appear to be maintained, and the most recent published version 0.12.1 includes a soundness bug. This has been fixed a few years ago, but was never released.
anymap
{ "license": "CC0-1.0" }
{ "affects": { "functions": [], "os": [], "arch": [] }, "affected_functions": null }
{ "cvss": null, "categories": [], "informational": "unmaintained" }