--- a/hgext/evolve.py	Wed Jun 24 20:23:41 2015 -0700
+++ b/hgext/evolve.py	Wed Jun 24 19:42:01 2015 -0700
@@ -2043,6 +2043,11 @@
         result = 1
     else:
         ui.warn(_('no children\n'))
+        aspchildren = _aspiringchildren(repo, [repo['.'].rev()])
+        if aspchildren:
+            msg = _('(%i unstable changesets to be evolved here, '
+                    'do you want to evolve?)\n')
+            ui.warn(msg % len(aspchildren))
         result = 1
     return result