From e2a64c713ff103cdeb4c8320de792487218d49ca Mon Sep 17 00:00:00 2001
From: Christian <16852529+cviereck@users.noreply.github.com>
Date: Mon, 27 Aug 2018 07:44:24 +0200
Subject: cast timestamps older than unix epoch to 0

This change solves issues #10870, which is caused by method castValue of class FileSearchBackend: It casts the timestamps older than the unix epoch to false., see my comment https://github.com/nextcloud/server/pull/10835#discussion_r212806153.
---
 apps/dav/lib/Files/FileSearchBackend.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/dav/lib/Files/FileSearchBackend.php b/apps/dav/lib/Files/FileSearchBackend.php
index cac6e8ac52b..0157ae038cb 100644
--- a/apps/dav/lib/Files/FileSearchBackend.php
+++ b/apps/dav/lib/Files/FileSearchBackend.php
@@ -355,7 +355,7 @@ class FileSearchBackend implements ISearchBackend {
 					return max(0, 0 + $value);
 				}
 				$date = \DateTime::createFromFormat(\DateTime::ATOM, $value);
-				return ($date instanceof \DateTime) ? $date->getTimestamp() : 0;
+				return ($date instanceof \DateTime && $date->getTimestamp() !== false) ? $date->getTimestamp() : 0;
 			default:
 				return $value;
 		}
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