Ensure MultiError returned when both Before and After funcs given

app.go

@@ -196,11 +196,12 @@ func (a *App) Run(arguments []string) (err error) {
 	}
 
 	if a.Before != nil {
-		err = a.Before(context)
-		if err != nil {
-			fmt.Fprintf(a.Writer, "%v\n\n", err)
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			fmt.Fprintf(a.Writer, "%v\n\n", beforeErr)
 			ShowAppHelp(context)
-			HandleExitCoder(err)
+			HandleExitCoder(beforeErr)
+			err = beforeErr
 			return err
 		}
 	}
@@ -286,7 +287,7 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 		if a.OnUsageError != nil {
 			err = a.OnUsageError(context, err, true)
 			HandleExitCoder(err)
-			return nil
+			return err
 		} else {
 			fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
 			ShowSubcommandHelp(context)
@@ -319,9 +320,10 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	}
 
 	if a.Before != nil {
-		err = a.Before(context)
-		if err != nil {
-			HandleExitCoder(err)
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			HandleExitCoder(beforeErr)
+			err = beforeErr
 			return err
 		}
 	}

app_test.go

@@ -522,6 +522,30 @@ func TestApp_BeforeFunc(t *testing.T) {
 	if counts.SubCommand != 0 {
 		t.Errorf("Subcommand executed when NOT expected")
 	}
+
+	// reset
+	counts = &opCounts{}
+
+	afterError := errors.New("fail again")
+	app.After = func(_ *Context) error {
+		return afterError
+	}
+
+	// run with the Before() func failing, wrapped by After()
+	err = app.Run([]string{"command", "--opt", "fail", "sub"})
+
+	// should be the same error produced by the Before func
+	if _, ok := err.(MultiError); !ok {
+		t.Errorf("MultiError expected, but not received")
+	}
+
+	if counts.Before != 1 {
+		t.Errorf("Before() not executed when expected")
+	}
+
+	if counts.SubCommand != 0 {
+		t.Errorf("Subcommand executed when NOT expected")
+	}
 }
 
 func TestApp_AfterFunc(t *testing.T) {
@@ -735,9 +759,10 @@ func TestApp_OrderOfOperations(t *testing.T) {
 		},
 	}
 
-	app.Action = func(c *Context) {
+	app.Action = func(c *Context) error {
 		counts.Total++
 		counts.Action = counts.Total
+		return nil
 	}
 
 	_ = app.Run([]string{"command", "--nope"})

context_test.go

@@ -154,9 +154,10 @@ func TestContext_GlobalFlag(t *testing.T) {
 	app.Flags = []Flag{
 		StringFlag{Name: "global, g", Usage: "global"},
 	}
-	app.Action = func(c *Context) {
+	app.Action = func(c *Context) error {
 		globalFlag = c.GlobalString("global")
 		globalFlagSet = c.GlobalIsSet("global")
+		return nil
 	}
 	app.Run([]string{"command", "-g", "foo"})
 	expect(t, globalFlag, "foo")