From b34f639fff1d65d7379633994d7bb2c299c38b7a Mon Sep 17 00:00:00 2001
From: alex-z <blackslayer4@gmail.com>
Date: Wed, 30 Mar 2022 18:07:49 +0300
Subject: [PATCH] Darkmode. Fix crash on exit.

Signed-off-by: alex-z <blackslayer4@gmail.com>
---
 src/libsync/theme.cpp | 11 +++++------
 src/libsync/theme.h   |  2 +-
 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;
-- 
2.30.2