fix: don't close argument type.

ref vimeo/psalm#8691 (comment)
php-standard-library · Nov 10, 2022 · 2c38013 · 2c38013
1 parent acec876
commit 2c38013
Showing 1 changed file with 1 addition and 4 deletions.
diff --git a/src/EventHandler/Type/Optional/FunctionReturnTypeProvider.php b/src/EventHandler/Type/Optional/FunctionReturnTypeProvider.php
@@ -28,9 +28,6 @@ public static function getFunctionReturnType(FunctionReturnTypeProviderEvent $ev
             return null;
         }
 
-        $clone = clone $argument_type;
-        $clone->possibly_undefined = true;
-
-        return $clone;
+        return $argument_type->setPossiblyUndefined(true);
     }
 }