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Throw exception to prevent infinite loop caused by third party code.
Third party code combined with `trigger_recollect` can cause infinite loops in some scenarios. The fix needs to be applied to the third party code, but the Magento core could be more explicit with these kinds of errors.
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‎app/code/Magento/Checkout/Model/Session.php‎

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@@ -41,6 +41,15 @@ class Session extends \Magento\Framework\Session\SessionManager
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*/
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protected $_loadInactive = false;
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/**
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* A flag to track when the quote is being loaded and attached to the session object.
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*
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* Used in trigger_recollect infinite loop detection.
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*
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* @var bool
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*/
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protected $_isLoading = false;
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/**
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* Loaded order instance
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*
@@ -210,6 +219,10 @@ public function getQuote()
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$this->_eventManager->dispatch('custom_quote_process', ['checkout_session' => $this]);
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if ($this->_quote === null) {
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if ($this->_isLoading) {
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throw new \LogicException("Infinite loop detected, review the trace for the looping path");
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}
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$this->_isLoading = true;
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$quote = $this->quoteFactory->create();
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if ($this->getQuoteId()) {
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try {
@@ -262,6 +275,7 @@ public function getQuote()
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$quote->setStore($this->_storeManager->getStore());
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$this->_quote = $quote;
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$this->_isLoading = false;
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}
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if (!$this->isQuoteMasked() && !$this->_customerSession->isLoggedIn() && $this->getQuoteId()) {

‎dev/tests/integration/_files/Magento/TestModuleQuoteTotalsObserver/Model/Config.php‎

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<?php
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/**
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* Copyright © Magento, Inc. All rights reserved.
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* See COPYING.txt for license details.
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*/
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declare(strict_types=1);
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namespace Magento\TestModuleQuoteTotalsObserver\Model;
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class Config
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{
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private $active = false;
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public function enableObserver()
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{
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$this->active = true;
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}
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public function disableObserver()
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{
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$this->active = false;
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}
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public function isActive()
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{
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return $this->active;
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}
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}
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‎dev/tests/integration/_files/Magento/TestModuleQuoteTotalsObserver/Observer/AfterCollectTotals.php‎

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@@ -0,0 +1,47 @@
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<?php
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/**
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* Copyright © Magento, Inc. All rights reserved.
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* See COPYING.txt for license details.
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*/
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declare(strict_types=1);
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namespace Magento\TestModuleQuoteTotalsObserver\Observer;
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use Magento\Framework\Event\Observer;
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use Magento\Framework\Event\ObserverInterface;
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class AfterCollectTotals implements ObserverInterface
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{
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/**
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* @var \Magento\Checkout\Model\Session
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*/
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private $session;
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/**
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* @var \Magento\TestModuleQuoteTotalsObserver\Model\Config
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*/
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private $config;
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/**
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* AfterCollectTotals constructor.
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* @param \Magento\Checkout\Model\Session $messageManager
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* @param \Magento\TestModuleQuoteTotalsObserver\Model\Config $config
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*/
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public function __construct(\Magento\Checkout\Model\Session $messageManager, \Magento\TestModuleQuoteTotalsObserver\Model\Config $config)
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{
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$this->config = $config;
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$this->session = $messageManager;
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}
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/**
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* @param Observer $observer
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* @return void
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*/
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public function execute(\Magento\Framework\Event\Observer $observer)
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{
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if ($this->config->isActive()) {
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$this->session->getQuote();
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}
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}
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}
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‎dev/tests/integration/_files/Magento/TestModuleQuoteTotalsObserver/etc/events.xml‎

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@@ -0,0 +1,12 @@
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<?xml version="1.0"?>
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<!--
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/**
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* Copyright © Magento, Inc. All rights reserved.
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* See COPYING.txt for license details.
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*/
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-->
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<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
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<event name="sales_quote_collect_totals_after">
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<observer name="test_module_quote_totals_observer_after_collect_totals" instance="Magento\TestModuleQuoteTotalsObserver\Observer\AfterCollectTotals" />
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</event>
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</config>

‎dev/tests/integration/_files/Magento/TestModuleQuoteTotalsObserver/etc/module.xml‎

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<?xml version="1.0"?>
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<!--
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/**
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* Copyright © Magento, Inc. All rights reserved.
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* See COPYING.txt for license details.
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*/
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-->
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<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
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<module name="Magento_TestModuleQuoteTotalsObserver" active="true">
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</module>
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</config>

‎dev/tests/integration/_files/Magento/TestModuleQuoteTotalsObserver/registration.php‎

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<?php
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/**
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* Copyright © Magento, Inc. All rights reserved.
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* See COPYING.txt for license details.
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*/
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use Magento\Framework\Component\ComponentRegistrar;
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$registrar = new ComponentRegistrar();
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if ($registrar->getPath(ComponentRegistrar::MODULE, 'Magento_TestModuleQuoteTotalsObserver') === null) {
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ComponentRegistrar::register(ComponentRegistrar::MODULE, 'Magento_TestModuleQuoteTotalsObserver', __DIR__);
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}

‎dev/tests/integration/testsuite/Magento/Quote/Model/QuoteInfiniteLoopTest.php‎

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@@ -0,0 +1,138 @@
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<?php
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/**
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* Copyright © Magento, Inc. All rights reserved.
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* See COPYING.txt for license details.
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*/
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declare(strict_types=1);
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namespace Magento\Quote\Model;
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use Magento\TestFramework\Helper\Bootstrap;
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use Magento\TestFramework\ObjectManager;
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/**
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* @SuppressWarnings(PHPMD.CouplingBetweenObjects)
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*/
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class QuoteInfiniteLoopTest extends \PHPUnit\Framework\TestCase
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{
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/**
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* @var ObjectManager
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*/
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private $objectManager;
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/**
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* @var \Magento\TestModuleQuoteTotalsObserver\Model\Config
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*/
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private $config;
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/**
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* @inheritdoc
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*/
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protected function setUp()
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{
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$this->objectManager = Bootstrap::getObjectManager();
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$this->config = $this->objectManager->get(\Magento\TestModuleQuoteTotalsObserver\Model\Config::class);
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$this->config->disableObserver();
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}
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/**
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* @inheritdoc
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*/
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protected function tearDown()
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{
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$this->config->disableObserver();
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$this->objectManager->removeSharedInstance(\Magento\Checkout\Model\Session::class);
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}
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/**
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* @dataProvider getLoadQuoteParametersProvider
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*
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* @param $triggerRecollect
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* @param $thirdPartObserverEnabled
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* @return void
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*/
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public function testLoadQuoteSuccessfully($triggerRecollect, $thirdPartObserverEnabled): void
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{
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$originalQuote = $this->generateQuote($triggerRecollect);
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$quoteId = $originalQuote->getId();
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$this->assertGreaterThan(0, $quoteId, "The quote should have a database id");
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$this->assertEquals(
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$triggerRecollect,
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$originalQuote->getTriggerRecollect(),
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"trigger_recollect failed to be set"
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);
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if ($thirdPartObserverEnabled) {
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$this->config->enableObserver();
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}
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/** @var $session \Magento\Checkout\Model\Session */
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$this->objectManager->removeSharedInstance(\Magento\Checkout\Model\Session::class);
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$session = $this->objectManager->get(\Magento\Checkout\Model\Session::class);
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$session->setQuoteId($quoteId);
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$quote = $session->getQuote();
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$this->assertEquals($quoteId, $quote->getId(), "The loaded quote should have the same ID as the initial quote");
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$this->assertEquals(0, $quote->getTriggerRecollect(), "trigger_recollect should be unset after a quote reload");
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}
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/**
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* @return array
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*/
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public function getLoadQuoteParametersProvider()
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{
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return [
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[0, false],
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[0, true],
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[1, false],
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//[1, true], this combination of trigger recollect and third party code causes the loop, tested separately
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];
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}
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/**
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* @expectedException \LogicException
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* @expectedExceptionMessage Infinite loop detected, review the trace for the looping path
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*
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* @return void
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*/
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public function testLoadQuoteWithTriggerRecollectInfiniteLoop(): void
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{
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$originalQuote = $this->generateQuote();
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$quoteId = $originalQuote->getId();
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$this->assertGreaterThan(0, $quoteId, "The quote should have a database id");
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$this->assertEquals(1, $originalQuote->getTriggerRecollect(), "The quote has trigger_recollect set");
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// Enable an observer which gets the quote from the session
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// The observer hooks into part of the collect totals process for an easy demonstration of the loop.
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$this->config->enableObserver();
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/** @var $session \Magento\Checkout\Model\Session */
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$this->objectManager->removeSharedInstance(\Magento\Checkout\Model\Session::class);
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$session = $this->objectManager->get(\Magento\Checkout\Model\Session::class);
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$session->setQuoteId($quoteId);
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$session->getQuote();
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}
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/**
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* Generate a quote with trigger_recollect and save it in the database.
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*
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* @param int $triggerRecollect
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* @return Quote
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*/
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private function generateQuote($triggerRecollect = 1)
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{
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//Fully init a quote with standard quote session procedure
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/** @var $session \Magento\Checkout\Model\Session */
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$session = $this->objectManager->create(\Magento\Checkout\Model\Session::class);
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$session->setQuoteId(null);
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$quote = $session->getQuote();
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$quote->setTriggerRecollect($triggerRecollect);
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/** @var \Magento\Quote\Api\CartRepositoryInterface $quoteRepository */
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$quoteRepository = $this->objectManager->create('\Magento\Quote\Api\CartRepositoryInterface');
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$quoteRepository->save($quote);
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return $quote;
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}
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}

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