```toml
[advisory]
id = "RUSTSEC-2020-0134"
package = "parc"
date = "2020-11-14"
url = "https://github.com/hyyking/rustracts/pull/6"
categories = ["memory-corruption", "thread-safety"]
aliases = ["CVE-2020-36454", "GHSA-29v7-3v4c-gf38", "GHSA-xwxc-j97j-84gf"]
cvss = "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"

[versions]
patched = []
```

# `LockWeak<T>` allows to create data race to `T`.

In the affected versions of this crate, `LockWeak<T>` unconditionally implemented `Send` with no trait bounds on `T`. `LockWeak<T>` doesn't own `T` and only provides `&T`.

This allows concurrent access to a non-Sync `T`, which can cause undefined behavior like data races.