diff -r 54589bb9604d -r a407fe56d6e8 mercurial/revset.py
--- a/mercurial/revset.py	Mon May 03 02:33:00 2021 +0200
+++ b/mercurial/revset.py	Fri Apr 30 03:09:16 2021 +0200
@@ -1724,7 +1724,7 @@
 def _node(repo, n):
     """process a node input"""
     rn = None
-    if len(n) == 40:
+    if len(n) == 2 * repo.nodeconstants.nodelen:
         try:
             rn = repo.changelog.rev(bin(n))
         except error.WdirUnsupported: