rust-dirstate: don't return a state for untracked entries

This `state` API is a remnant of the former API and is slated for removal at
some point. Any caller of this function will expect an entry that is tracked
in the larger sense.

Differential Revision: https://phab.mercurial-scm.org/D12448

rust/hg-core/src/dirstate_tree/dirstate_map.rs

@@ -343,7 +343,13 b" impl<'tree, 'on_disk> NodeRef<'tree, 'on"
     pub(super) fn state(
         &self,
     ) -> Result<Option<EntryState>, DirstateV2ParseError> {
-        Ok(self.entry()?.map(|e| e.state()))
+        Ok(self.entry()?.and_then(|e| {
+            if e.any_tracked() {
+                Some(e.state())
+            } else {
+                None
+            }
+        }))
     }
 
     pub(super) fn cached_directory_mtime(