--- /dev/null
+// 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 main() {}