diff -r 9b2e1b00ee94 -r 6994a8be3663 mercurial/utils/storageutil.py
--- a/mercurial/utils/storageutil.py	Tue Oct 16 17:48:28 2018 +0200
+++ b/mercurial/utils/storageutil.py	Tue Oct 16 17:45:39 2018 +0200
@@ -182,7 +182,8 @@
         try:
             return store.node(fileid)
         except IndexError:
-            raise error.LookupError(fileid, identifier, _('no match found'))
+            raise error.LookupError('%d' % fileid, identifier,
+                                    _('no match found'))
 
     if len(fileid) == 20:
         try: