symfony
diff --git a/‎src/Symfony/Component/Debug/DebugClassLoader.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Debug/DebugClassLoader.php
+4-1Lines changed: 4 additions & 1 deletion b/‎src/Symfony/Component/Debug/DebugClassLoader.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Debug/DebugClassLoader.php
+4-1Lines changed: 4 additions & 1 deletion
@@ -166,7 +166,7 @@ public function loadClass($class)
         try {
             if ($this->isFinder) {
                 if ($file = $this->classLoader[0]->findFile($class)) {
-                    require_once $file;
+                    $firstTime = 1 === require_once $file;
                 }
             } else {
                 call_user_func($this->classLoader, $class);
@@ -234,6 +234,9 @@ public function loadClass($class)
 
         if ($file) {
             if (!$exists) {
+                if (!$firstTime) {
+                    return;
+                }
                 if (false !== strpos($class, '/')) {
                     throw new \RuntimeException(sprintf('Trying to autoload a class with an invalid name "%s". Be careful that the namespace separator is "\" in PHP, not "/".', $class));
                 }