From 0e17d10bf325afed9ca3f133dd3d2e5cfb3a7724 Mon Sep 17 00:00:00 2001
From: Giuliano Zaro <3684609+GMagician@users.noreply.github.com>
Date: Fri, 14 Feb 2020 01:30:48 +0100
Subject: [PATCH] Fix G-code line parsing (#16840)

---
 Marlin/src/gcode/queue.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Marlin/src/gcode/queue.cpp b/Marlin/src/gcode/queue.cpp
index c01a92ab1..dbef8d233 100644
--- a/Marlin/src/gcode/queue.cpp
+++ b/Marlin/src/gcode/queue.cpp
@@ -363,8 +363,8 @@ inline void process_stream_char(const char c, uint8_t &sis, char (&buff)[MAX_CMD
 
 inline bool process_line_done(uint8_t &sis, char (&buff)[MAX_CMD_SIZE], int &ind) {
   sis = PS_NORMAL;
-  if (!ind) { thermalManager.manage_heater(); return true; }
   buff[ind] = 0;
+  if (!ind) { thermalManager.manage_heater(); return true; }
   ind = 0;
   return false;
 }
@@ -377,7 +377,7 @@ inline bool process_line_done(uint8_t &sis, char (&buff)[MAX_CMD_SIZE], int &ind
 void GCodeQueue::get_serial_commands() {
   static char serial_line_buffer[NUM_SERIAL][MAX_CMD_SIZE];
 
-  static uint8_t serial_input_state[NUM_SERIAL] = { 0 };
+  static uint8_t serial_input_state[NUM_SERIAL] = { PS_NORMAL };
 
   #if ENABLED(BINARY_FILE_TRANSFER)
     if (card.flag.binary_mode) {