Darkmode. Fix crash on exit.bufix/crash-on-exit

Signed-off-by: alex-z <blackslayer4@gmail.com>

2 files changed, 6 insertions, 7 deletions

diff --git a/src/libsync/theme.cpp b/src/libsync/theme.cpp
index 34bea7287..eb2268ca2 100644
--- a/src/libsync/theme.cpp
+++ b/src/libsync/theme.cpp
@@ -904,12 +904,11 @@ QColor Theme::errorBoxBorderColor() const
 
 void Theme::connectToPaletteSignal()
 {
-    if(!_guiAppInstance) {
-        const auto ptr = qobject_cast<QGuiApplication *>(QGuiApplication::instance());
-        if(ptr) {
-            _guiAppInstance.reset(ptr);
-            connect(_guiAppInstance.data(), &QGuiApplication::paletteChanged, this, &Theme::systemPaletteChanged);
-            connect(_guiAppInstance.data(), &QGuiApplication::paletteChanged, this, &Theme::darkModeChanged);
+    if (!_paletteSignalsConnected) {
+        if (const auto ptr = qobject_cast<QGuiApplication *>(QGuiApplication::instance())) {
+            connect(ptr, &QGuiApplication::paletteChanged, this, &Theme::systemPaletteChanged);
+            connect(ptr, &QGuiApplication::paletteChanged, this, &Theme::darkModeChanged);
+            _paletteSignalsConnected = true;
         }
     }
 }
diff --git a/src/libsync/theme.h b/src/libsync/theme.h
index df9303b23..180efbec2 100644
--- a/src/libsync/theme.h
+++ b/src/libsync/theme.h
@@ -627,7 +627,7 @@ private:
 
     static Theme *_instance;
     bool _mono = false;
-    QScopedPointer<QGuiApplication> _guiAppInstance;
+    bool _paletteSignalsConnected = false;
 
 #ifndef TOKEN_AUTH_ONLY
     mutable QHash<QString, QIcon> _iconCache;