From caae7195704b074663ca76737780d589f11c23a3 Mon Sep 17 00:00:00 2001
From: Markus Staab <maggus.staab@googlemail.com>
Date: Sun, 10 May 2026 12:28:09 +0200
Subject: [PATCH] DateFunctionReturnTypeHelper: prevent unnecessary
 TypeCombinator::union()

---
 src/Type/Php/DateFunctionReturnTypeHelper.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/Type/Php/DateFunctionReturnTypeHelper.php b/src/Type/Php/DateFunctionReturnTypeHelper.php
index 3126efe41b0..3cce51593b2 100644
--- a/src/Type/Php/DateFunctionReturnTypeHelper.php
+++ b/src/Type/Php/DateFunctionReturnTypeHelper.php
@@ -30,13 +30,13 @@ public function getTypeFromFormatType(Type $formatType, bool $useMicrosec): Type
 		}
 
 		if (count($types) === 0) {
-			$types[] = $formatType->isNonEmptyString()->yes()
+			$type = $formatType->isNonEmptyString()->yes()
 				? new IntersectionType([new StringType(), new AccessoryNonEmptyStringType()])
 				: new StringType();
+		} else {
+			$type = TypeCombinator::union(...$types);
 		}
 
-		$type = TypeCombinator::union(...$types);
-
 		if ($type->isNumericString()->no() && $formatType->isNonEmptyString()->yes()) {
 			$type = TypeCombinator::union($type, new IntersectionType([
 				new StringType(), new AccessoryNonEmptyStringType(),