symfony
diff --git a/‎src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
+4Lines changed: 4 additions & 0 deletions b/‎src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
+4Lines changed: 4 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
+4Lines changed: 4 additions & 0 deletions b/‎src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
+4Lines changed: 4 additions & 0 deletions
@@ -13,6 +13,10 @@
 
 use Symfony\Component\ExpressionLanguage\ExpressionLanguage as BaseExpressionLanguage;
 
+if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
+    throw new \RuntimeException('The ExpressionLanguage class requires the "ExpressionLanguage" component. Install "symfony/expression-language" to use it.');
+}
+
 /**
  * Adds some function to the default ExpressionLanguage.
  *
 
@@ -14,6 +14,10 @@
 use Symfony\Component\ExpressionLanguage\ExpressionFunction;
 use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
 
+if (!interface_exists('Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface')) {
+    throw new \RuntimeException('The ExpressionLanguage class requires the "ExpressionLanguage" component. Install "symfony/expression-language" to use it.');
+}
+
 /**
  * Define some ExpressionLanguage functions.
  *