--- a/mercurial/logcmdutil.py	Wed Nov 13 17:06:05 2019 +0100
+++ b/mercurial/logcmdutil.py	Thu Nov 14 11:11:38 2019 +0100
@@ -968,7 +968,7 @@
     differ = changesetdiffer()
     differ._makefilematcher = filematcher
     differ._makehunksfilter = hunksfilter
-    return revs, differ
+    return smartset.baseset(revs), differ
 
 
 def _graphnodeformatter(ui, displayer):