Add regression tests for #56445

[sjakobi]

Closes #56445.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Mark-Simulacrum (or someone else) soon.

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[sjakobi]

I'm very new to this project, so please correct me if I haven't picked the best locations for these tests! :)

[jackh726]

Thanks!

r? @jackh726

@bors r+ rollup

[bors]

📌 Commit 0927580 has been approved by jackh726