Issue 2263 fn subtyping#3872
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ci: bump actions/checkout to v4 Required for using Node.js 20.x in CI * Changelog for actions/checkout@v4 https://github.com/actions/checkout/blob/main/CHANGELOG.md?rgh-link-date=2024-09-04T18%3A38%3A10Z#v400 * GitHub Blog post https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/ Refs: rust-lang#130124 (comment)
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Requires only that the impl method signature be a subtype of the trait method signature. Not a complete fix for #2263 but it's a step in the right direction.