--- a/hgext/censor.py	Sun Sep 16 20:58:51 2018 +0530
+++ b/hgext/censor.py	Sat Sep 15 10:35:00 2018 +0900
@@ -85,9 +85,9 @@
     fnode = fctx.filenode()
     heads = []
     for headnode in repo.heads():
-        c = repo[headnode]
-        if path in c and c.filenode(path) == fnode:
-            heads.append(c)
+        hc = repo[headnode]
+        if path in hc and hc.filenode(path) == fnode:
+            heads.append(hc)
     if heads:
         headlist = ', '.join([short(c.node()) for c in heads])
         raise error.Abort(_('cannot censor file in heads (%s)') % headlist,