// run-rustfix #![allow(dead_code, unused_mut)] #![warn(clippy::mut_mutex_lock)] use std::sync::{Arc, Mutex}; fn mut_mutex_lock() { let mut value_rc = Arc::new(Mutex::new(42_u8)); let value_mutex = Arc::get_mut(&mut value_rc).unwrap(); let mut value = value_mutex.get_mut().unwrap(); *value += 1; } fn no_owned_mutex_lock() { let mut value_rc = Arc::new(Mutex::new(42_u8)); let mut value = value_rc.lock().unwrap(); *value += 1; } fn issue9415() { let mut arc_mutex = Arc::new(Mutex::new(42_u8)); let arc_mutex: &mut Arc<Mutex<u8>> = &mut arc_mutex; let mut guard = arc_mutex.lock().unwrap(); *guard += 1; } fn main() {}