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-rw-r--r--src/gui/kernel/qwidget_qws.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/gui/kernel/qwidget_qws.cpp b/src/gui/kernel/qwidget_qws.cpp
index d61cf0c..c5e36a9 100644
--- a/src/gui/kernel/qwidget_qws.cpp
+++ b/src/gui/kernel/qwidget_qws.cpp
@@ -652,7 +652,8 @@ void QWidgetPrivate::hide_sys()
q->releaseMouse();
// requestWindowRegion(QRegion());
- extra->topextra->backingStore->releaseBuffer();
+ if (extra->topextra->backingStore)
+ extra->topextra->backingStore->releaseBuffer();
QWidget::qwsDisplay()->requestFocus(data.winid,false);