From d86efae37cee055c323ee542559b68ae794a6cf5 Mon Sep 17 00:00:00 2001
From: Giuliano <3684609+GMagician@users.noreply.github.com>
Date: Sat, 28 Apr 2018 00:40:32 +0200
Subject: [PATCH] [1.1.x] report error on unsupported commands (#10554)

Raise an error when an unknown/unsupported G/M command is requires.
---
 Marlin/Marlin_main.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index bcf9cc5c5..21b07105e 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -12061,6 +12061,8 @@ void process_parsed_command() {
       #if ENABLED(DEBUG_GCODE_PARSER)
         case 800: parser.debug(); break;                          // G800: GCode Parser Test for G
       #endif
+
+      default: parser.unknown_command_error();
     }
     break;
 
@@ -12418,6 +12420,8 @@ void process_parsed_command() {
       #endif
 
       case 999: gcode_M999(); break;                              // M999: Restart after being Stopped
+      
+      default: parser.unknown_command_error();
     }
     break;