diff -r e97458bf53be -r 20fb4195bfc4 hgext3rd/topic/__init__.py
--- a/hgext3rd/topic/__init__.py	Fri Aug 12 11:09:26 2016 +0200
+++ b/hgext3rd/topic/__init__.py	Sat Aug 13 00:13:05 2016 +0200
@@ -263,10 +263,7 @@
             with repo.vfs.open('topic', 'w') as f:
                 f.write(topic)
         return
-    current = repo.currenttopic
-    for t in sorted(repo.topics):
-        marker = '*' if t == current else ' '
-        ui.write(' %s %s\n' % (marker, t))
+    _listtopics(ui, repo)
 
 @command('stack [TOPIC]', [] + commands.formatteropts)
 def cmdstack(ui, repo, topic='', **opts):
@@ -275,6 +272,12 @@
     List the current topic by default."""
     return stack.showstack(ui, repo, topic, opts)
 
+def _listtopics(ui, repo):
+    current = repo.currenttopic
+    for t in sorted(repo.topics):
+        marker = '*' if t == current else ' '
+        ui.write(' %s %s\n' % (marker, t))
+
 def summaryhook(ui, repo):
     t = repo.currenttopic
     if not t: