hgext/blackbox.py

--- a/hgext/blackbox.py	Tue Oct 10 10:27:35 2017 -0500
+++ b/hgext/blackbox.py	Wed Oct 11 15:25:57 2017 +0200
@@ -71,7 +71,7 @@
     default=False,
 )
 configitem('blackbox', 'track',
-    default=['*'],
+    default=lambda: ['*'],
 )
 
 lastui = None