1 files changed, 4 insertions, 0 deletions
diff --git a/launcher/Application.cpp b/launcher/Application.cpp
index 387f735c..0d3b086f 100644
--- a/launcher/Application.cpp
+++ b/launcher/Application.cpp
@@ -77,6 +77,7 @@
 #include "ApplicationMessage.h"
 
 #include <iostream>
+#include <mutex>
 
 #include <QAccessible>
 #include <QCommandLineParser>
@@ -150,6 +151,9 @@ namespace {
 /** This is used so that we can output to the log file in addition to the CLI. */
 void appDebugOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
+    static std::mutex loggerMutex;
+    const std::lock_guard<std::mutex> lock(loggerMutex); // synchronized, QFile logFile is not thread-safe
+
     QString out = qFormatLogMessage(type, context, msg);
     out += QChar::LineFeed;