From b3917f15b395a5dbc5f541aa98d60d954b5410f8 Mon Sep 17 00:00:00 2001
From: Chris Williams <chris.williams@helix.com>
Date: Mon, 26 Feb 2018 10:52:51 -0800
Subject: [PATCH] Return an error if not runnable

---
 command.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/command.go b/command.go
index 29675b33..d7d37ac1 100644
--- a/command.go
+++ b/command.go
@@ -17,6 +17,7 @@ package cobra
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -713,7 +714,7 @@ func (c *Command) execute(a []string) (err error) {
 	}
 
 	if !c.Runnable() {
-		return flag.ErrHelp
+		return errors.New("Subcommand required.")
 	}
 
 	c.preRun()