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c36696ac02
Fix `mut_mutex_lock` when Mutex is behind immutable deref I *think* the problem here is the `if let ty::Ref(_, _, Mutability::Mut) = cx.typeck_results().expr_ty(recv).kind()` line tries to check if the `Mutex` can be mutably borrowed (there already is a test for `Arc<Mutex<_>>`), but gets bamboozled by the `&mut Arc` indirection. And I *think* checking the deref-adjustment to filter immutable-adjust (the deref through the `Arc`, starting from `&mut Arc`) is the correct fix. Fixes #9415 changelog: Fix `mut_mutex_lock` when Mutex is behind immutable deref |
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