--- a/src/topic/__init__.py	Fri Jun 19 16:23:29 2015 -0500
+++ b/src/topic/__init__.py	Wed Sep 30 18:05:27 2015 -0400
@@ -16,6 +16,7 @@
 from mercurial import cmdutil
 from mercurial import commands
 from mercurial import context
+from mercurial import error
 from mercurial import extensions
 from mercurial import lock
 from mercurial import merge