diff --git a/defaultActions.go b/defaultActions.go
index b17640771..7190319b7 100644
--- a/defaultActions.go
+++ b/defaultActions.go
@@ -526,7 +526,7 @@ func ActionCobra(f func(cmd *cobra.Command, args []string, toComplete string) ([
 		case f == nil:
 			return ActionValues()
 		case c.cmd == nil:
-			return ActionMessage("cmd is nil [ActionCobra]")
+			return ActionMessage("cmd is nil [ActionCobra]") // TODO shall this be allowed? (might happen when invoked with custom context)
 		}
 		values, directive := f(c.cmd, c.cmd.Flags().Args(), c.Value)
 		return compDirective(directive).ToA(values...)