--- a/rust/hg-core/src/operations/debugdata.rs	Thu Dec 03 13:23:59 2020 -0800
+++ b/rust/hg-core/src/operations/debugdata.rs	Mon Nov 30 19:34:49 2020 +0100
@@ -24,6 +24,8 @@
     IoError(std::io::Error),
     /// The revision has not been found.
     InvalidRevision,
+    /// Found more than one revision whose ID match the requested prefix
+    AmbiguousPrefix,
     /// A `revlog` file is corrupted.
     CorruptedRevlog,
     /// The `revlog` format version is not supported.
@@ -69,6 +71,9 @@
             RevlogError::InvalidRevision => {
                 DebugDataErrorKind::InvalidRevision
             }
+            RevlogError::AmbiguousPrefix => {
+                DebugDataErrorKind::AmbiguousPrefix
+            }
             RevlogError::Corrupted => DebugDataErrorKind::CorruptedRevlog,
             RevlogError::UnknowDataFormat(format) => {
                 DebugDataErrorKind::UnknowRevlogDataFormat(format)