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-rw-r--r--framework/source/uielement/toolbarmerger.cxx2
1 files changed, 2 insertions, 0 deletions
diff --git a/framework/source/uielement/toolbarmerger.cxx b/framework/source/uielement/toolbarmerger.cxx
index 652383988bcd..faba3cb4e8d9 100644
--- a/framework/source/uielement/toolbarmerger.cxx
+++ b/framework/source/uielement/toolbarmerger.cxx
@@ -623,6 +623,8 @@ rtl::Reference<::cppu::OWeakObject> ToolBarMerger::CreateController(
void ToolBarMerger::CreateToolbarItem( ToolBox* pToolbar, ToolBox::ImplToolItems::size_type nPos, ToolBoxItemId nItemId, const AddonToolbarItem& rItem )
{
+ assert(pToolbar->GetItemData(nItemId) == nullptr); // that future would contain a double free
+
pToolbar->InsertItem( nItemId, rItem.aLabel, ToolBoxItemBits::NONE, nPos );
pToolbar->SetItemCommand( nItemId, rItem.aCommandURL );
pToolbar->SetQuickHelpText( nItemId, rItem.aLabel );