AbstractException.php: Exception should not use 'Store', if 'Store' can't be instantiated.

extension/qfq/qfq/exceptions/AbstractException.php

@@ -9,6 +9,7 @@
 namespace qfq;
 
 require_once(__DIR__ . '/../../qfq/store/Store.php');
+require_once(__DIR__ . '/UserFormException.php');
 
 
 class AbstractException extends \Exception {
@@ -25,7 +26,13 @@ class AbstractException extends \Exception {
      */
     public function formatException() {
         $debug = '';
-        $store = Store::getInstance();
+        try {
+            // In a very early stage, it might be possible that Store can't be initialized: take care not to use it.
+            $store = Store::getInstance();
+        } catch (UserFormException $e) {
+            $store = null;
+        }
+
         $html = '';
 
         $this->messageArray['File'] = $this->getFile();
@@ -33,8 +40,10 @@ class AbstractException extends \Exception {
         $this->messageArray['Message'] = $this->getMessage();
         $this->messageArray['Code'] = $this->getCode();
         $this->messageArray['Stacktrace'] = '<pre>' . $this->getTraceAsString() . '</pre>';
-        $this->messageArray['Page Id'] = $store->getVar(TYPO3_PAGE_ID, STORE_TYPO3);
-        $this->messageArray['Content Id'] = $store->getVar(TYPO3_TT_CONTENT_UID, STORE_TYPO3);
+        if ($store !== null) {
+            $this->messageArray['Page Id'] = $store->getVar(TYPO3_PAGE_ID, STORE_TYPO3);
+            $this->messageArray['Content Id'] = $store->getVar(TYPO3_TT_CONTENT_UID, STORE_TYPO3);
+        }
 
         $html .= "Code: " . $this->messageArray['Code'] . "<br>";
         $html .= "Message: " . Support::wrapTag("<strong>", $this->messageArray['Message']) . "</br>";
@@ -50,7 +59,7 @@ class AbstractException extends \Exception {
         $html = "<h2>Error</h2>" . Support::wrapTag('<p>', $html);
         $html = Support::wrapTag("<div class='warning'>", $html);
 
-        if ($store->getVar(SYSTEM_SHOW_DEBUG_INFO, STORE_SYSTEM) === 'yes') {
+        if ($store !== null && $store->getVar(SYSTEM_SHOW_DEBUG_INFO, STORE_SYSTEM) === 'yes') {
 
             // Layout
             $debug = '<tr bgcolor="#dddddd"><td colspan="2">Exception</td></tr>';