[DepdenencyInjection] Prevent self-referencing aliases

symfony · Feb 12, 2011 · 315f96d · 315f96d
1 parent 6b25015
commit 315f96d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/ContainerBuilder.php b/ContainerBuilder.php
@@ -427,6 +427,10 @@ public function setAlias($alias, $id)
             throw new \InvalidArgumentException('$id must be a string, or an Alias object.');
         }
 
+        if ($alias === strtolower($id)) {
+            throw new \InvalidArgumentException('An alias can not reference itself, got a circular reference on "'.$alias.'".');
+        }
+
         unset($this->definitions[$alias]);
 
         $this->aliases[$alias] = $id;