From b237e7e4b13bf9f8ef061eaee0d8e834721f30db Mon Sep 17 00:00:00 2001
From: Vladyslav Podorozhnyi <vpodorozh@gmail.com>
Date: Fri, 8 Dec 2023 21:32:53 +0100
Subject: [PATCH] Fix integration tests

Test: \Magento\Framework\Backup\DbTest::testBackupAndRollbackIncludesCustomTriggers

Error:
Unable to revert fixture: Magento/Framework/Backup/_files/trigger.php
#0 /var/www/html/dev/tests/integration/testsuite/Magento/Framework/Backup/DbTest.php(42): Magento\Framework\Backup\DbTest->testBackupAndRollbackIncludesCustomTriggers()
---
 library/Zend/Db/Statement.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/library/Zend/Db/Statement.php b/library/Zend/Db/Statement.php
index 46d175c..b4307ab 100644
--- a/library/Zend/Db/Statement.php
+++ b/library/Zend/Db/Statement.php
@@ -209,6 +209,12 @@ protected function _stripQuoted($sql)
         // remove "foo\"bar"
         $sql = preg_replace("/\"(\\\\\"|[^\"])*\"/Us", '', $sql);
 
+        if ($sql === null) {
+            // this preg_replace call can return NULL in case of error (PREG_BACKTRACK_LIMIT_ERROR).
+            // In this case the result of this method will be an empty string.
+            return '';
+        }
+        
         // get the character for delimited id quotes,
         // this is usually " but in MySQL is `
         $d = $this->_adapter->quoteIdentifier('a');