Fix reflection leak if type inside type list is resolved

Author: nikic

ext/reflection/php_reflection.c

@@ -231,14 +231,7 @@ static void reflection_free_objects_storage(zend_object *object) /* {{{ */
 		case REF_TYPE_TYPE:
 		{
 			type_reference *type_ref = intern->ptr;
-			if (ZEND_TYPE_HAS_LIST(type_ref->type)) {
-				void *entry;
-				ZEND_TYPE_LIST_FOREACH(ZEND_TYPE_LIST(type_ref->type), entry) {
-					if (ZEND_TYPE_LIST_IS_NAME(entry)) {
-						zend_string_release(ZEND_TYPE_LIST_GET_NAME(entry));
-					}
-				} ZEND_TYPE_LIST_FOREACH_END();
-			} else if (ZEND_TYPE_HAS_NAME(type_ref->type)) {
+			if (ZEND_TYPE_HAS_NAME(type_ref->type)) {
 				zend_string_release(ZEND_TYPE_NAME(type_ref->type));
 			}
 			efree(type_ref);
@@ -1174,16 +1167,12 @@ static void reflection_type_factory(zend_type type, zval *object, zend_bool lega
 	intern->ptr = reference;
 	intern->ref_type = REF_TYPE_TYPE;
 
-	/* Property types may be resolved during the lifetime of the ReflectionType,
-	 * so we need to make sure that the strings we reference are not released. */
-	if (ZEND_TYPE_HAS_LIST(type)) {
-		void *entry;
-		ZEND_TYPE_LIST_FOREACH(ZEND_TYPE_LIST(type), entry) {
-			if (ZEND_TYPE_LIST_IS_NAME(entry)) {
-				zend_string_addref(ZEND_TYPE_LIST_GET_NAME(entry));
-			}
-		} ZEND_TYPE_LIST_FOREACH_END();
-	} else if (ZEND_TYPE_HAS_NAME(type)) {
+	/* Property types may be resolved during the lifetime of the ReflectionType.
+	 * If we reference a string, make sure it doesn't get released. However, only
+	 * do this for the top-level type, as resolutions inside type lists will be
+	 * fully visible to us (we'd have to do a fully copy of the type if we wanted
+	 * to prevent that). */
+	if (ZEND_TYPE_HAS_NAME(type)) {
 		zend_string_addref(ZEND_TYPE_NAME(type));
 	}
 }

ext/reflection/tests/bug78774.phpt

@@ -5,18 +5,24 @@ Bug #78774: ReflectionNamedType on Typed Properties Crash
 
 class Test {
     public stdClass $prop;
+    public stdClass|Foo $prop2;
 }
 
 $rc = new ReflectionClass(Test::class);
 $rp = $rc->getProperty('prop');
 $rt = $rp->getType();
+$rp2 = $rc->getProperty('prop2');
+$rt2 = $rp2->getType();
 
 // Force a resolution of the property type
 $test = new Test;
 $test->prop = new stdClass;
+$test->prop2 = new stdClass;
 
 var_dump($rt->getName());
+var_dump((string) $rt2);
 
 ?>
 --EXPECT--
 string(8) "stdClass"
+string(12) "stdClass|Foo"