diff -r eb55274d3650 -r 5dbf875b3275 rust/rhg/src/error.rs
--- a/rust/rhg/src/error.rs	Wed Jul 29 10:26:17 2020 +0200
+++ b/rust/rhg/src/error.rs	Wed Jul 29 15:49:44 2020 +0200
@@ -1,5 +1,6 @@
 use crate::exitcode;
 use crate::ui::UiError;
+use hg::operations::{FindRootError, FindRootErrorKind};
 use hg::utils::files::get_bytes_from_path;
 use std::convert::From;
 use std::path::PathBuf;
@@ -90,3 +91,16 @@
         }
     }
 }
+
+impl From<FindRootError> for CommandError {
+    fn from(err: FindRootError) -> Self {
+        match err.kind {
+            FindRootErrorKind::RootNotFound(path) => CommandError {
+                kind: CommandErrorKind::RootNotFound(path),
+            },
+            FindRootErrorKind::GetCurrentDirError(e) => CommandError {
+                kind: CommandErrorKind::CurrentDirNotFound(e),
+            },
+        }
+    }
+}