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Adjust OR_PATTERNS_BACK_COMPAT lint level #84869

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ehuss opened this issue May 3, 2021 · 1 comment · Fixed by #86192
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Adjust OR_PATTERNS_BACK_COMPAT lint level #84869

ehuss opened this issue May 3, 2021 · 1 comment · Fixed by #86192
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A-edition-2021 Area: The 2021 edition A-lint Area: Lints (warnings about flaws in source code) such as unused_mut.

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@ehuss
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ehuss commented May 3, 2021 •
edited by rustbot
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The OR_PATTERNS_BACK_COMPAT lint level should be adjusted for the 2021 edition. Either the lint should be warn-by-default always, or it should be a 2021 future-incompatible lint. This is needed to smoothly migrate projects to 2021.

There is some appeal to making it always warn for less confusion, as long as the lint works well. I think this course needs to be overridable via 2021 migration (see https://github.com/orgs/rust-lang/projects/7#card-59862192), and be aware that projects which support a wide range of rustc versions may be forced to allow it.
@ehuss ehuss added A-lint Area: Lints (warnings about flaws in source code) such as unused_mut. A-edition-2021 Area: The 2021 edition labels May 3, 2021
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Rustin170506 commented May 3, 2021 •
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@rustbot claim

Maybe it should be a 2021 future-incompatible lint?

@Rustin170506 Rustin170506 mentioned this issue Jun 10, 2021
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@bors bors closed this as completed in 3ee78b3 Jun 21, 2021
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A-edition-2021 Area: The 2021 edition A-lint Area: Lints (warnings about flaws in source code) such as unused_mut.
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Make OR_PATTERNS_BACK_COMPAT be a 2021 future-incompatible lint Rustin170506/rust
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