[BUGFIX] Prevent exception in early bootstrap exception handler

ErrorPageController which is used by the ProductionExceptionHandler
must not rely on PackageManager to be available. Rather use
paths derived from Environment::getFrameworkBasePath().

Releases: master, 9.5
Resolves: #87503
Related: #87175
Change-Id: I556b503e06962b338ec11f2e031eb941417d5944
Reviewed-on: https://review.typo3.org/59518
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>

Classes/Controller/ErrorPageController.php

@@ -15,8 +15,8 @@
  * The TYPO3 project - inspiring people to share!
  */
 
+use TYPO3\CMS\Core\Core\Environment;
 use TYPO3\CMS\Core\Messaging\AbstractMessage;
-use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Core\Utility\PathUtility;
 use TYPO3Fluid\Fluid\Core\Rendering\RenderingContext;
@@ -51,7 +51,7 @@ public function __construct()
         $context->setControllerName('ErrorPage');
         $context->setTemplatePaths(new TemplatePaths([
             'templateRootPaths' => [
-                ExtensionManagementUtility::extPath('core', 'Resources/Private/Templates/ErrorPage/')
+                Environment::getFrameworkBasePath() . '/core/Resources/Private/Templates/ErrorPage/'
             ]
         ]));
         $this->view->setRenderingContext($context);
@@ -86,8 +86,8 @@ public function errorAction(
         $this->view->assign('title', $title);
         $this->view->assign('errorCodeUrlPrefix', TYPO3_URL_EXCEPTION);
         $this->view->assign('errorCode', $errorCode);
-        $this->view->assign('logo', PathUtility::getAbsoluteWebPath(ExtensionManagementUtility::extPath('backend', 'Resources/Public/Images/typo3_orange.svg')));
-        $this->view->assign('cssFile', PathUtility::getAbsoluteWebPath(ExtensionManagementUtility::extPath('core', 'Resources/Public/Css/errorpage.css')));
+        $this->view->assign('logo', PathUtility::getAbsoluteWebPath(Environment::getFrameworkBasePath() . '/backend/Resources/Public/Images/typo3_orange.svg'));
+        $this->view->assign('cssFile', PathUtility::getAbsoluteWebPath(Environment::getFrameworkBasePath() . '/core/Resources/Public/Css/errorpage.css'));
         $this->view->assign('copyrightYear', TYPO3_copyright_year);
         return $this->view->render('Error');
     }