With current MediaWiki master (1.43.0-alpha, 406014b) and AWS master (d35a60a9156d6aaf79a3b774d5f065c9af03b54f) I'm getting the following error:
Fatal error: Class AmazonS3FileBackend contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (FileBackendStore::doMoveInternal) in mediawiki/extensions/AWS/s3/AmazonS3FileBackend.php on line 39
With current MediaWiki master (1.43.0-alpha, 406014b) and AWS master (d35a60a9156d6aaf79a3b774d5f065c9af03b54f) I'm getting the following error: