Fix OOM during cache clean-up

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

1 files changed, 7 insertions, 6 deletions

diff --git a/lib/Db/MessageMapper.php b/lib/Db/MessageMapper.php
index 63d0e1e13..011c7d7b5 100644
--- a/lib/Db/MessageMapper.php
+++ b/lib/Db/MessageMapper.php
@@ -1225,9 +1225,10 @@ class MessageMapper extends QBMapper {
 			->leftJoin('m', 'mail_mailboxes', 'mb', $qb1->expr()->eq('m.mailbox_id', 'mb.id'))
 			->where($qb1->expr()->isNull('mb.id'));
 		$result = $idsQuery->execute();
-		$ids = array_map(function (array $row) {
-			return (int)$row['id'];
-		}, $result->fetchAll());
+		$ids = [];
+		while ($row = $result->fetch()) {
+			$ids[] = (int) $row['id'];
+		}
 		$result->closeCursor();
 
 		$qb2 = $this->db->getQueryBuilder();
@@ -1247,9 +1248,9 @@ class MessageMapper extends QBMapper {
 				$qb3->expr()->isNull('r.local_message_id')
 			);
 		$result = $recipientIdsQuery->execute();
-		$ids = array_map(function (array $row) {
-			return (int)$row['id'];
-		}, $result->fetchAll());
+		while ($row = $result->fetch()) {
+			$ids[] = (int) $row['id'];
+		}
 		$result->closeCursor();
 
 		$qb4 = $this->db->getQueryBuilder();