diff --git a/include/Compat.h b/include/Compat.h
index 18d2b90..c68ebfe 100644
--- a/include/Compat.h
+++ b/include/Compat.h
@@ -12,9 +12,9 @@ using DWORD = unsigned long;
 using PDWORD = unsigned long*;
 using LPDWORD = unsigned long*;
 char _getch();
-inline void CloseSocketProper(int socket) {
-    shutdown(socket, SHUT_RDWR);
-    close(socket);
+inline void CloseSocketProper(int TheSocket) {
+    shutdown(TheSocket, SHUT_RDWR);
+    close(TheSocket);
 }
 #endif // unix
 
@@ -23,9 +23,9 @@ inline void CloseSocketProper(int socket) {
 #ifdef WIN32
 #include <conio.h>
 #include <winsock2.h>
-inline void CloseSocketProper(SOCKET socket) {
-    shutdown(socket, SD_BOTH);
-    closesocket(socket);
+inline void CloseSocketProper(SOCKET TheSocket) {
+    shutdown(TheSocket, SD_BOTH);
+    closesocket(TheSocket);
 }
 #endif // WIN32
 
diff --git a/include/TSentry.h b/include/TSentry.h
index ee76247..125aa75 100644
--- a/include/TSentry.h
+++ b/include/TSentry.h
@@ -4,6 +4,7 @@
 #include <sentry.h>
 
 #include <string>
+#include <mutex>
 
 // TODO possibly use attach_stacktrace
 
@@ -16,6 +17,7 @@ public:
     void PrintWelcome();
     void SetupUser();
     void Log(sentry_level_t level, const std::string& logger, const std::string& text);
+    void LogDebug(const std::string& text, const std::string& file, const std::string& line);
     void AddExtra(const std::string& key, const sentry_value_t& value);
     void AddExtra(const std::string& key, const std::string& value);
     void LogException(const std::exception& e, const std::string& file, const std::string& line);
@@ -25,6 +27,7 @@ public:
 
 private:
     bool mValid { true };
+    std::mutex mMutex;
 };
 
 #endif // SENTRY_H
diff --git a/src/TSentry.cpp b/src/TSentry.cpp
index b029333..75b3bd3 100644
--- a/src/TSentry.cpp
+++ b/src/TSentry.cpp
@@ -45,6 +45,11 @@ void TSentry::Log(sentry_level_t level, const std::string& logger, const std::st
     sentry_remove_transaction();
 }
 
+void TSentry::LogDebug(const std::string& text, const std::string& file, const std::string& line) {
+    SetTransaction(file + ":" + line);
+    Log(SENTRY_LEVEL_DEBUG, "default", file +  ": "  + text);
+}
+
 void TSentry::AddExtra(const std::string& key, const sentry_value_t& value) {
     if (!mValid) {
         return;
diff --git a/src/TServer.cpp b/src/TServer.cpp
index 7be220e..d2106f6 100644
--- a/src/TServer.cpp
+++ b/src/TServer.cpp
@@ -323,6 +323,10 @@ void TServer::Apply(TClient& c, int VID, const std::string& pckt) {
     std::string VD = c.GetCarData(VID);
     if (VD.empty()) {
         error("Tried to apply change to vehicle that does not exist");
+        Sentry.AddExtra("packet", Packet);
+        Sentry.AddExtra("vehicle-id", std::to_string(VID));
+        Sentry.AddExtra("client-car-count", std::to_string(c.GetCarCount()));
+        Sentry.LogDebug("attempt to apply change to nonexistent vehicle", _file_basename, _line);
         return;
     }
     std::string Header = VD.substr(0, VD.find('{'));