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-rw-r--r--vcl/unx/gtk3/gtk3gtkinst.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index 96107c011cb2..9ab4bae06a09 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -2741,6 +2741,7 @@ public:
auto xEmbedWindow = VclPtr<ChildFrame>::Create(ImplGetDefaultWindow(), WB_SYSTEMCHILDWINDOW | WB_DIALOGCONTROL | WB_CHILDDLGCTRL);
SalFrame* pFrame = xEmbedWindow->ImplGetFrame();
GtkSalFrame* pGtkFrame = dynamic_cast<GtkSalFrame*>(pFrame);
+ assert(pGtkFrame);
// relocate that toplevel GtkEventBox into this widget
GtkWidget* pWindow = pGtkFrame->getWindow();