Handle null in QQuickPointerEvent and QQEventPoint debug operators

For example qDebug() << event->asMouseEvent() could crash if the
event is not a mouse event.

Change-Id: I34ffadeb9fc23f42d1d6939190c43a6486eea533
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/quick/items/qquickevents.cpp b/src/quick/items/qquickevents.cpp
index 8303c3fed1..7d128b4a16 100644
--- a/src/quick/items/qquickevents.cpp
+++ b/src/quick/items/qquickevents.cpp
@@ -1937,6 +1937,10 @@ Q_QUICK_PRIVATE_EXPORT QDebug operator<<(QDebug dbg, const QQuickPointerEvent *e
 {
     QDebugStateSaver saver(dbg);
     dbg.nospace();
+    if (!event) {
+        dbg << "QQuickPointerEvent(0)";
+        return dbg;
+    }
     dbg << "QQuickPointerEvent(";
     dbg << event->timestamp();
     dbg << " dev:";
@@ -1957,6 +1961,10 @@ Q_QUICK_PRIVATE_EXPORT QDebug operator<<(QDebug dbg, const QQuickEventPoint *eve
 {
     QDebugStateSaver saver(dbg);
     dbg.nospace();
+    if (!event) {
+        dbg << "QQuickEventPoint(0)";
+        return dbg;
+    }
     dbg << "QQuickEventPoint(accepted:" << event->isAccepted()
         << " state:";
     QtDebugUtils::formatQEnum(dbg, event->state());