diff -r bf8837e3d7ce -r 3d0a9c6e614d rust/hg-core/src/repo.rs
--- a/rust/hg-core/src/repo.rs	Mon Sep 27 12:09:15 2021 +0200
+++ b/rust/hg-core/src/repo.rs	Mon Sep 27 13:52:49 2021 +0200
@@ -294,12 +294,12 @@
             } else {
                 OwningDirstateMap::new_empty(Vec::new())
             };
-            let (on_disk, placeholder) = map.get_mut_pair();
+            let (on_disk, placeholder) = map.get_pair_mut();
             *placeholder = DirstateMap::new_v2(on_disk, data_size, metadata)?;
             Ok(map)
         } else {
             let mut map = OwningDirstateMap::new_empty(dirstate_file_contents);
-            let (on_disk, placeholder) = map.get_mut_pair();
+            let (on_disk, placeholder) = map.get_pair_mut();
             let (inner, parents) = DirstateMap::new_v1(on_disk)?;
             self.dirstate_parents
                 .set(Some(parents.unwrap_or(DirstateParents::NULL)));