From 4684c68a44b306b9cddea439d006d19540343068 Mon Sep 17 00:00:00 2001
From: Jason Varga <jason@pixelfear.com>
Date: Mon, 22 Jul 2024 18:33:30 -0400
Subject: [PATCH] fix

---
 src/Extension/Attributes/Util/AttributesHelper.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Extension/Attributes/Util/AttributesHelper.php b/src/Extension/Attributes/Util/AttributesHelper.php
index 9ea9643185..11b6eec482 100644
--- a/src/Extension/Attributes/Util/AttributesHelper.php
+++ b/src/Extension/Attributes/Util/AttributesHelper.php
@@ -24,7 +24,7 @@
 final class AttributesHelper
 {
     private const SINGLE_ATTRIBUTE = '\s*([.]-?[_a-z][^\s}]*|[#][^\s}]+|' . RegexHelper::PARTIAL_ATTRIBUTENAME . RegexHelper::PARTIAL_ATTRIBUTEVALUESPEC . '?)\s*';
-    private const ATTRIBUTE_LIST   = '/^{:?(' . self::SINGLE_ATTRIBUTE . ')+}/i';
+    private const ATTRIBUTE_LIST   = '/^{(?!{):?(' . self::SINGLE_ATTRIBUTE . ')+}(?!})/i';
 
     /**
      * @return array<string, mixed>