hgext/convert/filemap.py

--- a/hgext/convert/filemap.py	Sat May 06 04:51:25 2017 +0530
+++ b/hgext/convert/filemap.py	Fri Feb 10 16:56:29 2017 -0800
@@ -310,7 +310,7 @@
             # map to any revision in the restricted graph.  Put SKIPREV
             # in the set of wanted ancestors to simplify code elsewhere
             self.parentmap[rev] = SKIPREV
-            self.wantedancestors[rev] = set((SKIPREV,))
+            self.wantedancestors[rev] = {SKIPREV}
             return
 
         # Reuse the data from our parent.