diff -r 821929d59e01 -r e8ae91b1a63d rust/rhg/src/error.rs
--- a/rust/rhg/src/error.rs	Sat Mar 20 02:03:57 2021 +0530
+++ b/rust/rhg/src/error.rs	Tue Mar 23 19:58:49 2021 +0530
@@ -157,6 +157,9 @@
 impl From<(RevlogError, &str)> for CommandError {
     fn from((err, rev): (RevlogError, &str)) -> CommandError {
         match err {
+            RevlogError::WDirUnsupported => CommandError::abort(
+                "abort: working directory revision cannot be specified",
+            ),
             RevlogError::InvalidRevision => CommandError::abort(format!(
                 "abort: invalid revision identifier: {}",
                 rev