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The current version of derive_builder is 0.20.2.

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ub-risk-0 (implies ub-risk-1)

No unsafe code.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-0

ub-risk-1 (implies ub-risk-2)
Implied by other criteria

Excellent soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-1

ub-risk-2 (implies ub-risk-3)
Implied by other criteria

Negligible unsoundness or average soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-2

ub-risk-3 (implies ub-risk-4)
Implied by other criteria

Mild unsoundness or suboptimal soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-3

ub-risk-4
Implied by other criteria

Extreme unsoundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-4


Crates in the crates.io registry are tarball snapshots uploaded by crates' publishers. The registry is not using crates' git repositories. There is absolutely no guarantee that the repository URL declared by the crate belongs to the crate, or that the code in the repository is the code inside the published tarball.

To review the actual code of the crate, it's best to use cargo crev open derive_builder. Alternatively, you can download the tarball of derive_builder v0.20.2 or view the source online.