From 6469f22054fe7bb62ead451e5cf5ce127bb91172 Mon Sep 17 00:00:00 2001
From: Markus Staab <maggus.staab@googlemail.com>
Date: Fri, 19 Dec 2025 17:38:28 +0100
Subject: [PATCH] Prevent unnecessary scope merging

---
 src/Analyser/MutatingScope.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Analyser/MutatingScope.php b/src/Analyser/MutatingScope.php
index 5a07151b15..6a88cb308d 100644
--- a/src/Analyser/MutatingScope.php
+++ b/src/Analyser/MutatingScope.php
@@ -4816,7 +4816,7 @@ public function isInFirstLevelStatement(): bool
 
 	public function mergeWith(?self $otherScope): self
 	{
-		if ($otherScope === null) {
+		if ($otherScope === null || $this === $otherScope) {
 			return $this;
 		}
 		$ourExpressionTypes = $this->expressionTypes;