StackView: fix heap-use-after-free when pushing after clear

This patch extends the work done in aaec25a7 to cover all operations.

Note also that b94889f4 does a similar thing to this patch and
aaec25a7, in that it explicitly ignores operations that are done during
the removal of elements.

Fixes: QTBUG-84381
Pick-to: 5.15
Change-Id: Id8bbbded39d8e58bcf0e8eedeb2dde794952333f
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/quicktemplates2/qquickstackview_p.cpp b/src/quicktemplates2/qquickstackview_p.cpp
index 1655ff36..ce81a929 100644
--- a/src/quicktemplates2/qquickstackview_p.cpp
+++ b/src/quicktemplates2/qquickstackview_p.cpp
@@ -56,6 +56,12 @@ void QQuickStackViewPrivate::warn(const QString &error)
         qmlWarning(q) << operation << ": " << error;
 }
 
+void QQuickStackViewPrivate::warnOfInterruption(const QString &attemptedOperation)
+{
+    Q_Q(QQuickStackView);
+    qmlWarning(q) << "cannot " << attemptedOperation << " while already in the process of completing a " << operation;
+}
+
 void QQuickStackViewPrivate::setCurrentItem(QQuickStackElement *element)
 {
     Q_Q(QQuickStackView);