From 14690c8465bc887c36197926b8be8980c846a4d2 Mon Sep 17 00:00:00 2001
From: Markus Staab <maggus.staab@googlemail.com>
Date: Sun, 25 Jan 2026 09:33:29 +0100
Subject: [PATCH] TemplateTypeHelper: prevent unnecessary work

---
 src/Type/Generic/TemplateTypeHelper.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Type/Generic/TemplateTypeHelper.php b/src/Type/Generic/TemplateTypeHelper.php
index 29ecd48720..6f09c29ccb 100644
--- a/src/Type/Generic/TemplateTypeHelper.php
+++ b/src/Type/Generic/TemplateTypeHelper.php
@@ -24,6 +24,10 @@ public static function resolveTemplateTypes(
 		bool $keepErrorTypes = false,
 	): Type
 	{
+		if (!$type->hasTemplateOrLateResolvableType()) {
+			return $type;
+		}
+
 		$references = $type->getReferencedTemplateTypes($positionVariance);
 
 		return TypeTraverser::map($type, static function (Type $type, callable $traverse) use ($standins, $references, $callSiteVariances, $keepErrorTypes): Type {