Nothing more...

src/main.rs

@@ -236,7 +236,7 @@ fn main() {
         }));
     }
     for child in children {
-        let _ = child.join();
+        child.join();
     }
 
     // compute file hash in parallel
@@ -250,8 +250,7 @@ fn main() {
     println!("Use {} chunk(s) of size {}", num_cpus - modulus, chunk_size - 1);
 
     let mut guards = vec![];
-    let fc = files_candidate.clone();
-    let mut work = fc.lock().unwrap();
+    let mut work = files_candidate.clone().lock().unwrap();
 
     // Example from :
     // https://stackoverflow.com/questions/33818141/how-do-i-pass-disjoint-slices-from-a-vector-to-different-threads