Code reviews of the Inconceivable crate // Lib.rs

RUSTSEC-2022-0058 (notice) on 2022-09-28: Library exclusively intended to inject UB into safe Rust.

Quoting from the crate description:

This crate is created purely to inject undefined behavior into stable, safe rust.

Specifically, the inconceivable! macro is insta-UB if the ub_inconceivable feature is enabled by any reverse dependency. The value this adds is questionable, and hides unsafe code from naive analysis.

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Lib.rs has been able to verify that all files in the crate's tarball are in the crate's repository. Please note that this check is still in beta, and absence of this confirmation does not mean that the files don't match.

Crates in the crates.io registry are tarball snapshots uploaded by crates' publishers. The registry is not using crates' git repositories, so there is a possibility that published crates have a misleading repository URL, or contain different code from the code in the repository.

To review the actual code of the crate, it's best to use cargo crev open inconceivable. Alternatively, you can download the tarball of inconceivable v0.9.0 or view the source online.