--- a/tests/test-rebase-parameters.t	Fri Mar 13 19:29:02 2020 -0700
+++ b/tests/test-rebase-parameters.t	Fri Mar 13 16:39:32 2020 -0700
@@ -100,6 +100,10 @@
   abort: cannot rebase the working copy
   [255]
 
+  $ hg rebase --source 1 --source 'wdir()' --dest 6
+  abort: cannot rebase the working copy
+  [255]
+
   $ hg rebase --source '1 & !1' --dest 8
   empty "source" revision set - nothing to rebase
   [1]