Merge pull request #37772 from nextcloud/enh/30986/follow-up

Prevent the OpenDocument preview generator from trying to open empty files

lib/private/Preview/Bundled.php

@@ -31,6 +31,10 @@ use OCP\IImage;
  */
 abstract class Bundled extends ProviderV2 {
 	protected function extractThumbnail(File $file, string $path): ?IImage {
+		if ($file->getSize() === 0) {
+			return null;
+		}
+
 		$sourceTmp = \OC::$server->getTempManager()->getTemporaryFile();
 		$targetTmp = \OC::$server->getTempManager()->getTemporaryFile();
 		$this->tmpFiles[] = $sourceTmp;