--- a/mercurial/bundle2.py	Wed Apr 16 23:36:57 2014 -0400
+++ b/mercurial/bundle2.py	Wed Apr 16 23:18:27 2014 -0400
@@ -309,7 +309,7 @@
             # itself represents a defect of a different variety).
             output = None
             if op.reply is not None:
-                op.ui.pushbuffer()
+                op.ui.pushbuffer(error=True)
                 output = ''
             try:
                 handler(op, part)