4 files changed, 12 insertions, 19 deletions
diff --git a/src/gui/kernel/qevent.cpp b/src/gui/kernel/qevent.cpp
index 2b28052dd5..f2f083c277 100644
--- a/src/gui/kernel/qevent.cpp
+++ b/src/gui/kernel/qevent.cpp
@@ -2695,10 +2695,6 @@ QNativeGestureEvent::QNativeGestureEvent(Qt::NativeGestureType type, const QPoin
 { }
 #endif
 
-typedef QHash<const QNativeGestureEvent*, const QTouchDevice*> NativeGestureEventDataHash;
-// ### Qt6: move this to a member in QNativeGestureEvent
-Q_GLOBAL_STATIC(NativeGestureEventDataHash, g_nativeGestureEventDataHash)
-
 /*!
     Constructs a native gesture event of type \a type originating from \a device.
 
@@ -2713,27 +2709,20 @@ QNativeGestureEvent::QNativeGestureEvent(Qt::NativeGestureType type, const QTouc
                                          const QPointF &screenPos, qreal realValue, ulong sequenceId, quint64 intValue)
     : QInputEvent(QEvent::NativeGesture), mGestureType(type),
       mLocalPos(localPos), mWindowPos(windowPos), mScreenPos(screenPos), mRealValue(realValue),
-      mSequenceId(sequenceId), mIntValue(intValue)
+      mSequenceId(sequenceId), mIntValue(intValue), mDevice(device)
 {
-    g_nativeGestureEventDataHash->insert(this, device);
 }
 
 QNativeGestureEvent::~QNativeGestureEvent()
-{
-    g_nativeGestureEventDataHash->remove(this);
-}
+    = default;
 
 /*!
+    \fn const QTouchDevice *QNativeGestureEvent::device() const
     \since 5.10
 
     Returns the device.
 */
 
-const QTouchDevice *QNativeGestureEvent::device() const
-{
-    return g_nativeGestureEventDataHash->value(this);
-}
-
 /*!
     \fn QNativeGestureEvent::gestureType() const
     \since 5.2
diff --git a/src/gui/kernel/qevent.h b/src/gui/kernel/qevent.h
index dc33a83ac0..8a0e42f592 100644
--- a/src/gui/kernel/qevent.h
+++ b/src/gui/kernel/qevent.h
@@ -350,7 +350,7 @@ public:
     const QPointF &windowPos() const { return mWindowPos; }
     const QPointF &screenPos() const { return mScreenPos; }
 
-    const QTouchDevice *device() const;
+    const QTouchDevice *device() const { return mDevice; }
 
 protected:
     Qt::NativeGestureType mGestureType;
@@ -360,6 +360,7 @@ protected:
     qreal mRealValue;
     ulong mSequenceId;
     quint64 mIntValue;
+    const QTouchDevice *mDevice;
 };
 #endif // QT_NO_GESTURES
 
@@ -853,7 +854,6 @@ private:
     qint64 m_numericId;
 };
 Q_DECLARE_TYPEINFO(QPointingDeviceUniqueId, Q_MOVABLE_TYPE);
-template <> class QList<QPointingDeviceUniqueId> {}; // to prevent instantiation: use QVector instead
 
 Q_GUI_EXPORT bool operator==(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs) noexcept;
 inline bool operator!=(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs) noexcept
diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index b4c4231910..fa4c419ef0 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -1184,14 +1184,18 @@ Q_LOGGING_CATEGORY(lcQpaPluginLoading, "qt.qpa.plugin");
 
 static void init_platform(const QString &pluginNamesWithArguments, const QString &platformPluginPath, const QString &platformThemeName, int &argc, char **argv)
 {
-    QStringList plugins = pluginNamesWithArguments.split(QLatin1Char(';'));
+    QStringList plugins = pluginNamesWithArguments.split(QLatin1Char(';'), QString::SkipEmptyParts);
     QStringList platformArguments;
     QStringList availablePlugins = QPlatformIntegrationFactory::keys(platformPluginPath);
     for (const auto &pluginArgument : plugins) {
         // Split into platform name and arguments
-        QStringList arguments = pluginArgument.split(QLatin1Char(':'));
+        QStringList arguments = pluginArgument.split(QLatin1Char(':'), QString::SkipEmptyParts);
+        if (arguments.isEmpty())
+            continue;
         const QString name = arguments.takeFirst().toLower();
         QString argumentsKey = name;
+        if (name.isEmpty())
+            continue;
         argumentsKey[0] = argumentsKey.at(0).toUpper();
         arguments.append(QLibraryInfo::platformPluginArguments(argumentsKey));
 
diff --git a/src/gui/kernel/qwindowdefs.h b/src/gui/kernel/qwindowdefs.h
index b4f3ed4712..cb0842da8c 100644
--- a/src/gui/kernel/qwindowdefs.h
+++ b/src/gui/kernel/qwindowdefs.h
@@ -43,6 +43,7 @@
 #include <QtGui/qtguiglobal.h>
 #include <QtCore/qobjectdefs.h>
 #include <QtCore/qnamespace.h>
+#include <QtCore/qcontainerfwd.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -80,7 +81,6 @@ class QString;
 class QByteArray;
 class QApplication;
 
-template<typename T> class QList;
 typedef QList<QWidget *> QWidgetList;
 typedef QList<QWindow *> QWindowList;