diff -r 19d946cf2a1b -r 4c4b3c37776c mercurial/commands.py
--- a/mercurial/commands.py	Tue Sep 29 14:33:31 2015 -0500
+++ b/mercurial/commands.py	Thu Sep 24 17:52:21 2015 -0700
@@ -6388,7 +6388,7 @@
                 try:
                     op = bundle2.processbundle(repo, gen, lambda: tr)
                     tr.close()
-                except error.UnsupportedPartError as exc:
+                except error.BundleUnknownFeatureError as exc:
                     raise util.Abort(_('%s: unknown bundle feature, %s')
                                      % (fname, exc),
                                      hint=_("see https://mercurial.selenic.com/"