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34ef13b15b
fix false negative for `unused_mut` fixes https://github.com/rust-lang/rust/issues/110849 We want to avoid double diagnostics for code like this, but only if an error actually occurs: ```rust fn main() { let mut x: (i32, i32); x.0 = 1; } ``` The first commit fixes the lint and the second one removes all the unused `mut`s it found.