From 48a6b710b46ae2e0186c2fc8eb06866c0c07dfdc Mon Sep 17 00:00:00 2001
From: William Desportes <williamdes@wdes.fr>
Date: Wed, 17 Feb 2021 19:11:20 +0100
Subject: [PATCH] Improve Tracker::getVersion failure case

Signed-off-by: William Desportes <williamdes@wdes.fr>
---
 libraries/classes/Tracker.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/libraries/classes/Tracker.php b/libraries/classes/Tracker.php
index 6adc61029e..42fa70108f 100644
--- a/libraries/classes/Tracker.php
+++ b/libraries/classes/Tracker.php
@@ -537,6 +537,7 @@ class Tracker
      */
     public static function getVersion($dbname, $tablename, $statement = null)
     {
+        /** @var DatabaseInterface $dbi */
         global $dbi;
 
         $relation = new Relation($dbi);
@@ -549,7 +550,14 @@ class Tracker
             $sql_query .= " AND FIND_IN_SET('"
                 . $statement . "',tracking) > 0";
         }
-        $row = $dbi->fetchArray($relation->queryAsControlUser($sql_query, false));
+
+        $result = $relation->queryAsControlUser($sql_query, false);
+
+        if ($result === false) {
+            return -1;
+        }
+
+        $row = $dbi->fetchArray($result);
 
         return $row[0] ?? -1;
     }