Traverse parent contexts

context.go

@@ -194,8 +194,12 @@ func (cCtx *Context) checkRequiredFlags(flags []Flag) requiredFlagsErr {
 }
 
 func (cCtx *Context) onInvalidFlag(name string) {
-	if cCtx.App != nil && cCtx.App.InvalidFlagAccessHandler != nil {
-		cCtx.App.InvalidFlagAccessHandler(cCtx, name)
+	for cCtx != nil {
+		if cCtx.App != nil && cCtx.App.InvalidFlagAccessHandler != nil {
+			cCtx.App.InvalidFlagAccessHandler(cCtx, name)
+			break
+		}
+		cCtx = cCtx.parentContext
 	}
 }
 

context_test.go

@@ -151,15 +151,27 @@ func TestContext_Value(t *testing.T) {
 }
 
 func TestContext_Value_InvalidFlagAccessHandler(t *testing.T) {
-	set := flag.NewFlagSet("test", 0)
 	var flagName string
 	app := &App{
 		InvalidFlagAccessHandler: func(_ *Context, name string) {
 			flagName = name
 		},
+		Commands: []*Command{
+			{
+				Name: "command",
+				Subcommands: []*Command{
+					{
+						Name: "subcommand",
+						Action: func(ctx *Context) error {
+							ctx.Value("missing")
+							return nil
+						},
+					},
+				},
+			},
+		},
 	}
-	c := NewContext(app, set, nil)
-	c.Value("missing")
+	expect(t, app.Run([]string{"run", "command", "subcommand"}), nil)
 	expect(t, flagName, "missing")
 }