--- a/rust/hg-cpython/src/dirstate/owning.rs	Thu Jul 08 19:23:44 2021 +0200
+++ b/rust/hg-cpython/src/dirstate/owning.rs	Thu Jul 15 23:02:17 2021 +0200
@@ -49,9 +49,11 @@
         py: Python,
         on_disk: PyBytes,
         data_size: usize,
+        tree_metadata: PyBytes,
     ) -> Result<Self, DirstateError> {
         let bytes: &'_ [u8] = on_disk.data(py);
-        let map = DirstateMap::new_v2(bytes, data_size)?;
+        let map =
+            DirstateMap::new_v2(bytes, data_size, tree_metadata.data(py))?;
 
         // Like in `bytes` above, this `'_` lifetime parameter borrows from
         // the bytes buffer owned by `on_disk`.