--- a/layout/painting/nsDisplayList.cpp
+++ b/layout/painting/nsDisplayList.cpp
@@ -1194,19 +1194,16 @@ nsDisplayListBuilder::~nsDisplayListBuil
                "All frames should have been unmarked");
   NS_ASSERTION(mPresShellStates.Length() == 0,
                "All presshells should have been exited");
   NS_ASSERTION(!mCurrentTableItem, "No table item should be active");
 
   for (nsDisplayItem* i : mTemporaryItems) {
     i->Destroy(this);
   }
-  for (nsDisplayItem* i : mTemporaryItems) {
-    i->Destroy(this);
-  }
   for (DisplayItemClipChain* c : mClipChainsToDestroy) {
 #ifdef USE_HEAP_ALLOCATED_CLIP_CHAINS
     delete c;
 #else
      c->DisplayItemClipChain::~DisplayItemClipChain();
 #endif
   }