diff -r 591a8069b60e -r fbe380dc227a mercurial/pycompat.py
--- a/mercurial/pycompat.py	Tue Jun 21 06:29:23 2016 -0700
+++ b/mercurial/pycompat.py	Fri Jun 24 02:04:43 2016 +0200
@@ -15,6 +15,7 @@
     pickle.dumps
 except ImportError:
     import pickle
+    pickle.dumps # silence pyflakes
 
 try:
     import cStringIO as io