From 74f7912b4c45585111bab1e7fc16f23f4887912a Mon Sep 17 00:00:00 2001
From: Marco <49691247+marcoSchr@users.noreply.github.com>
Date: Tue, 15 Aug 2023 18:52:29 +0200
Subject: [PATCH] Fix M17 callsign decoder sometimes causing crashes

---
 openrtx/src/protocols/M17/M17Callsign.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/openrtx/src/protocols/M17/M17Callsign.cpp b/openrtx/src/protocols/M17/M17Callsign.cpp
index 1d06c80a..c426b8cd 100644
--- a/openrtx/src/protocols/M17/M17Callsign.cpp
+++ b/openrtx/src/protocols/M17/M17Callsign.cpp
@@ -98,7 +98,8 @@ std::string M17::decode_callsign(const call_t& encodedCall)
 
     while(encoded)
     {
-        result[index++] = charMap[encoded % 40];
+        result.push_back(charMap[encoded % 40]);
+        index++;
         encoded /= 40;
     }