mercurial/debugcommands.py

--- a/mercurial/debugcommands.py	Mon May 22 10:41:32 2017 -0700
+++ b/mercurial/debugcommands.py	Mon May 22 11:08:18 2017 -0700
@@ -810,11 +810,7 @@
     ignore = repo.dirstate._ignore
     if not files:
         # Show all the patterns
-        includepat = getattr(ignore, 'includepat', None)
-        if includepat is not None:
-            ui.write("%s\n" % includepat)
-        else:
-            raise error.Abort(_("no ignore patterns found"))
+        ui.write("%s\n" % repr(ignore))
     else:
         for f in files:
             nf = util.normpath(f)