From d58eb020d0739203831099dd43236510fd6470ab Mon Sep 17 00:00:00 2001
From: Christian Flothmann <christian.flothmann@sensiolabs.de>
Date: Sun, 31 May 2020 09:33:39 +0200
Subject: [PATCH] reset the internal state when the parser is finished

---
 src/Symfony/Component/ExpressionLanguage/Parser.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Symfony/Component/ExpressionLanguage/Parser.php b/src/Symfony/Component/ExpressionLanguage/Parser.php
index 34658b97c0c0..fb9c321c4b9f 100644
--- a/src/Symfony/Component/ExpressionLanguage/Parser.php
+++ b/src/Symfony/Component/ExpressionLanguage/Parser.php
@@ -124,6 +124,9 @@ private function doParse(TokenStream $stream, ?array $names = []): Node\Node
             throw new SyntaxError(sprintf('Unexpected token "%s" of value "%s".', $stream->current->type, $stream->current->value), $stream->current->cursor, $stream->getExpression());
         }
 
+        $this->stream = null;
+        $this->names = null;
+
         return $node;
     }