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@dtolnay dtolnay commented Dec 16, 2025

See https://rust-lang.github.io/rustup/environment-variables.html. "When set, allows rustup to fall-back to copying files if attempts to rename result in cross-device link errors. These errors occur on OverlayFS, which is used by Docker. This feature sacrifices some transactions protections and may be removed at any point."

Closes #176.

@dtolnay dtolnay merged commit f7ccc83 into master Dec 16, 2025
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@dtolnay dtolnay deleted the permitcopyrename branch December 16, 2025 17:11
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Fails on replacing rust toolchain from docker image

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