From 5e12486ff9fa6bbeabb73b1988523b34e08e0aea Mon Sep 17 00:00:00 2001
From: Kaushik Iska <iska.kaushik@gmail.com>
Date: Tue, 1 Nov 2022 14:59:13 -0400
Subject: [PATCH] Print useful error messages when invalid options are given
 (flutter/engine#37212)

---
 engine/src/flutter/sky/tools/flutter_gdb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/engine/src/flutter/sky/tools/flutter_gdb b/engine/src/flutter/sky/tools/flutter_gdb
index 78e435eccb4..ee62dc52fbd 100755
--- a/engine/src/flutter/sky/tools/flutter_gdb
+++ b/engine/src/flutter/sky/tools/flutter_gdb
@@ -223,6 +223,7 @@ def main():
     subparsers = parser.add_subparsers(help='sub-command help')
     parser.add_argument('--adb', type=str, help='path to ADB tool')
     parser.add_argument('--device', type=str, help='serial number of the target device')
+    parser.set_defaults(func=lambda args: parser.print_help())
 
     commands = [
         GdbClient(),