From db0ab41ea444d1367dd754a3b7f9f995427fc391 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kuba=20Szczodrzy=C5=84ski?= <kuba@szczodrzynski.pl>
Date: Mon, 2 Jan 2023 16:03:49 +0100
Subject: [PATCH] [realtek-ambz] Check SoftwareSerial before stopping

---
 .../realtek-ambz/libraries/SoftwareSerial/SoftwareSerial.cpp    | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arduino/realtek-ambz/libraries/SoftwareSerial/SoftwareSerial.cpp b/arduino/realtek-ambz/libraries/SoftwareSerial/SoftwareSerial.cpp
index a9e5da8..75cc4d4 100644
--- a/arduino/realtek-ambz/libraries/SoftwareSerial/SoftwareSerial.cpp
+++ b/arduino/realtek-ambz/libraries/SoftwareSerial/SoftwareSerial.cpp
@@ -83,6 +83,8 @@ void SoftwareSerial::begin(unsigned long baudrate, uint16_t config) {
 }
 
 void SoftwareSerial::end() {
+	if (!(bool)this)
+		return;
 	gtimer_stop(OBJ);
 	gtimer_deinit(OBJ);
 	free(OBJ);