diff -r 9bc36198338e -r 205bd3936179 mercurial/exchange.py
--- a/mercurial/exchange.py	Sat May 13 03:37:50 2017 +0900
+++ b/mercurial/exchange.py	Mon May 08 17:30:51 2017 -0700
@@ -1330,7 +1330,9 @@
     For now, the only supported data are changegroup."""
     kwargs = {'bundlecaps': caps20to10(pullop.repo)}
 
-    streaming, streamreqs = streamclone.canperformstreamclone(pullop)
+    # At the moment we don't do stream clones over bundle2. If that is
+    # implemented then here's where the check for that will go.
+    streaming = False
 
     # pulling changegroup
     pullop.stepsdone.add('changegroup')