diff -r a5a673ec8f6f -r d2f760c2c91c rust/hg-core/src/dirstate_tree/dirstate_map.rs
--- a/rust/hg-core/src/dirstate_tree/dirstate_map.rs	Mon Oct 11 22:19:42 2021 +0200
+++ b/rust/hg-core/src/dirstate_tree/dirstate_map.rs	Tue Oct 12 16:20:05 2021 +0200
@@ -330,9 +330,9 @@
 
     pub(super) fn cached_directory_mtime(
         &self,
-    ) -> Option<&'tree on_disk::Timestamp> {
+    ) -> Option<crate::dirstate::Timestamp> {
         match self {
-            NodeRef::InMemory(_path, node) => match &node.data {
+            NodeRef::InMemory(_path, node) => match node.data {
                 NodeData::CachedDirectory { mtime } => Some(mtime),
                 _ => None,
             },
@@ -376,7 +376,7 @@
 
 pub(super) enum NodeData {
     Entry(DirstateEntry),
-    CachedDirectory { mtime: on_disk::Timestamp },
+    CachedDirectory { mtime: crate::dirstate::Timestamp },
     None,
 }