1 files changed, 9 insertions, 6 deletions
diff --git a/src/corelib/animation/qabstractanimation.cpp b/src/corelib/animation/qabstractanimation.cpp
index 8fa4707..7c2d690 100644
--- a/src/corelib/animation/qabstractanimation.cpp
+++ b/src/corelib/animation/qabstractanimation.cpp
@@ -392,13 +392,16 @@ int QUnifiedTimer::closestPauseAnimationTimeToFinish()
 
 void QUnifiedTimer::installAnimationDriver(QAnimationDriver *d)
 {
-    if (driver->isRunning()) {
-        qWarning("QUnifiedTimer: Cannot change animation driver while animations are running");
-        return;
-    }
+    if (driver) {
+
+        if (driver->isRunning()) {
+            qWarning("QUnifiedTimer: Cannot change animation driver while animations are running");
+            return;
+        }
 
-    if (driver && driver != &defaultDriver)
-        delete driver;
+        if (driver != &defaultDriver)
+            delete driver;
+    }
 
     driver = d;
 }