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New lint: copy_then_borrow_mut #13984

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New lint: copy_then_borrow_mut #13984

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samueltardieu
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This detects when the result of a block, with a Copy type, is borrowed mutably. The user might not be aware that using a block will borrow a copy instead of the value expression itself.

changelog: [copy_then_borrow_mut]: new lint

Close #13967

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rustbot commented Jan 11, 2025

r? @blyxyas

rustbot has assigned @blyxyas.
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@rustbot rustbot added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties label Jan 11, 2025
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reborrow or copy-then-borrow
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