diff -r 295625f1296b -r 681046de87f1 tests/test-rebase-scenario-global.t
--- a/tests/test-rebase-scenario-global.t	Sat Mar 11 13:53:14 2017 -0500
+++ b/tests/test-rebase-scenario-global.t	Sat Mar 11 10:35:44 2017 -0800
@@ -329,6 +329,10 @@
   abort: can't rebase public changeset e1c4361dd923
   (see 'hg help phases' for details)
   [255]
+  $ hg rebase -d 5 -r '1 + (6::)'
+  abort: can't rebase public changeset e1c4361dd923
+  (see 'hg help phases' for details)
+  [255]
 
   $ hg rebase -d 5 -b 6 --keep
   rebasing 6:e1c4361dd923 "C"