--TEST-- MongoDB\Driver\WriteError debug output --SKIPIF-- --FILE-- insert(['_id' => 1]); $bulk->insert(['_id' => 1]); $bulk->insert(['_id' => 1]); try { $manager->executeBulkWrite(NS, $bulk); } catch(MongoDB\Driver\Exception\BulkWriteException $e) { var_dump($e->getWriteResult()->getWriteErrors()[0]); } ?> ===DONE=== --EXPECTF-- object(MongoDB\Driver\WriteError)#%d (%d) { ["message"]=> string(95) "E11000 duplicate key error index: phongo.writeError_writeerror_debug_001.$_id_ dup key: { : 1 }" ["code"]=> int(11000) ["index"]=> int(1) ["info"]=> NULL } ===DONE===