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Minimal test - lines (317, 354)

Code

nsClipboard::GetNativeClipboardData(nsITransferable* aTransferable, int32_t aWhichClipboard) {
  NS_OBJC_BEGIN_TRY_BLOCK_RETURN;

  if ((aWhichClipboard != kGlobalClipboard && aWhichClipboard != kFindClipboard) || !aTransferable)
    return NS_ERROR_FAILURE;

  NSPasteboard* cocoaPasteboard;
  if (aWhichClipboard == kFindClipboard) {
    cocoaPasteboard = [NSPasteboard pasteboardWithName:NSFindPboard];
  } else {
    cocoaPasteboard = [NSPasteboard generalPasteboard];
  }
  if (!cocoaPasteboard) return NS_ERROR_FAILURE;

  // get flavor list that includes all acceptable flavors (including ones obtained through
  // conversion)
  nsTArray flavors;
  nsresult rv = aTransferable->FlavorsTransferableCanImport(flavors);
  if (NS_FAILED(rv)) return NS_ERROR_FAILURE;

  // If we were the last ones to put something on the pasteboard, then just use the cached
  // transferable. Otherwise clear it because it isn't relevant any more.
  if (mCachedClipboard == aWhichClipboard && mChangeCount == [cocoaPasteboard changeCount]) {
    if (mTransferable) {
      for (uint32_t i = 0; i < flavors.Length(); i++) {
        nsCString& flavorStr = flavors[i];

        nsCOMPtr dataSupports;
        rv = mTransferable->GetTransferData(flavorStr.get(), getter_AddRefs(dataSupports));
        if (NS_SUCCEEDED(rv)) {
          aTransferable->SetTransferData(flavorStr.get(), dataSupports);
          return NS_OK;  // maybe try to fill in more types? Is there a point?
        }
      }
    }
  } else {
    EmptyClipboard(aWhichClipboard);
  }

Minimal test - lines (95, 95)

Code

void nsClipboard::ClearSelectionCache() { sSelectionCache = nullptr; }