--- a/rust/hg-core/src/dirstate_tree/on_disk.rs	Thu Jan 06 22:09:40 2022 -0800
+++ b/rust/hg-core/src/dirstate_tree/on_disk.rs	Fri Jan 14 10:25:45 2022 -0800
@@ -207,7 +207,7 @@
             // One random hexadecimal digit.
             // `unwrap` never panics because `impl Write for String`
             // never returns an error.
-            write!(&mut id, "{:x}", rng.gen_range(0, 16)).unwrap();
+            write!(&mut id, "{:x}", rng.gen_range(0..16)).unwrap();
         }
         id
     }