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-rw-r--r--src/widgets/widgets/qmdisubwindow.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/widgets/widgets/qmdisubwindow.cpp b/src/widgets/widgets/qmdisubwindow.cpp
index cab60f75ec..1808030639 100644
--- a/src/widgets/widgets/qmdisubwindow.cpp
+++ b/src/widgets/widgets/qmdisubwindow.cpp
@@ -3058,6 +3058,9 @@ void QMdiSubWindow::leaveEvent(QEvent * /*leaveEvent*/)
/*!
\reimp
+
+ \warning When maximizing or restoring a subwindow, the resulting call to this function
+ may have an invalid QResizeEvent::oldSize().
*/
void QMdiSubWindow::resizeEvent(QResizeEvent *resizeEvent)
{