3 files changed, 17 insertions, 6 deletions
diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 03ea937ab3..6503acaef0 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -3293,12 +3293,8 @@ QPalette QGuiApplication::palette()
 */
 void QGuiApplication::setPalette(const QPalette &pal)
 {
-    if (QGuiApplicationPrivate::app_pal && pal.isCopyOf(*QGuiApplicationPrivate::app_pal))
+    if (!QGuiApplicationPrivate::setPalette(pal))
         return;
-    if (!QGuiApplicationPrivate::app_pal)
-        QGuiApplicationPrivate::app_pal = new QPalette(pal);
-    else
-        *QGuiApplicationPrivate::app_pal = pal;
 
     QCoreApplication::setAttribute(Qt::AA_SetPalette);
 
@@ -3306,6 +3302,19 @@ void QGuiApplication::setPalette(const QPalette &pal)
         qGuiApp->d_func()->sendApplicationPaletteChange();
 }
 
+bool QGuiApplicationPrivate::setPalette(const QPalette &palette)
+{
+    if (app_pal && palette.isCopyOf(*app_pal))
+        return false;
+
+    if (!app_pal)
+        app_pal = new QPalette(palette);
+    else
+        *app_pal = palette;
+
+    return true;
+}
+
 void QGuiApplicationPrivate::applyWindowGeometrySpecificationTo(QWindow *window)
 {
     windowGeometrySpecification.applyTo(window);
diff --git a/src/gui/kernel/qguiapplication_p.h b/src/gui/kernel/qguiapplication_p.h
index 9f3fa7212a..a8017216d4 100644
--- a/src/gui/kernel/qguiapplication_p.h
+++ b/src/gui/kernel/qguiapplication_p.h
@@ -326,6 +326,8 @@ public:
 
     static void resetCachedDevicePixelRatio();
 
+    static bool setPalette(const QPalette &palette);
+
 protected:
     virtual void notifyThemeChanged();
     virtual void sendApplicationPaletteChange(bool toAllWidgets = false, const char *className = nullptr);
diff --git a/src/gui/kernel/qinputdevicemanager_p_p.h b/src/gui/kernel/qinputdevicemanager_p_p.h
index 871f9315c3..82a86446a0 100644
--- a/src/gui/kernel/qinputdevicemanager_p_p.h
+++ b/src/gui/kernel/qinputdevicemanager_p_p.h
@@ -69,7 +69,7 @@ public:
     int deviceCount(QInputDeviceManager::DeviceType type) const;
     void setDeviceCount(QInputDeviceManager::DeviceType type, int count);
 
-    std::array<int, QInputDeviceManager::NumDeviceTypes> m_deviceCount;
+    std::array<int, QInputDeviceManager::NumDeviceTypes> m_deviceCount = {};
 
     Qt::KeyboardModifiers keyboardModifiers;
 };