--- a/rust/hg-core/src/dirstate_tree/on_disk.rs	Fri Oct 08 12:57:24 2021 +0200
+++ b/rust/hg-core/src/dirstate_tree/on_disk.rs	Tue Oct 12 15:29:05 2021 +0200
@@ -15,7 +15,7 @@
 use format_bytes::format_bytes;
 use std::borrow::Cow;
 use std::convert::{TryFrom, TryInto};
-use std::time::{Duration, SystemTime, UNIX_EPOCH};
+use std::time::{SystemTime, UNIX_EPOCH};
 
 /// Added at the start of `.hg/dirstate` when the "v2" format is used.
 /// This a redundant sanity check more than an actual "magic number" since
@@ -462,18 +462,6 @@
     }
 }
 
-impl From<&'_ Timestamp> for SystemTime {
-    fn from(timestamp: &'_ Timestamp) -> Self {
-        let secs = timestamp.seconds.get();
-        let nanos = timestamp.nanoseconds.get();
-        if secs >= 0 {
-            UNIX_EPOCH + Duration::new(secs as u64, nanos)
-        } else {
-            UNIX_EPOCH - Duration::new((-secs) as u64, nanos)
-        }
-    }
-}
-
 fn read_hg_path(
     on_disk: &[u8],
     slice: PathSlice,

--- a/rust/hg-core/src/dirstate_tree/status.rs	Fri Oct 08 12:57:24 2021 +0200
+++ b/rust/hg-core/src/dirstate_tree/status.rs	Tue Oct 12 15:29:05 2021 +0200
@@ -199,7 +199,8 @@
                 // directory eligible for `read_dir` caching.
                 if let Some(meta) = directory_metadata {
                     if let Ok(current_mtime) = meta.modified() {
-                        if current_mtime == cached_mtime.into() {
+                        let current_mtime = Timestamp::from(current_mtime);
+                        if current_mtime == *cached_mtime {
                             // The mtime of that directory has not changed
                             // since then, which means that the results of
                             // `read_dir` should also be unchanged.