Unserialize: Migrate "%s is returned from __sleep() multiple times" to E_WARNING

Author: TimWolla

ext/standard/tests/serialize/bug71995.phpt

@@ -18,7 +18,7 @@ var_dump($s);
 var_dump(unserialize($s));
 ?>
 --EXPECTF--
-Notice: serialize(): "b" is returned from __sleep() multiple times in %s on line %d
+Warning: serialize(): "b" is returned from __sleep() multiple times in %s on line %d
 string(39) "O:1:"A":1:{s:1:"b";O:8:"stdClass":0:{}}"
 object(A)#%d (1) {
   ["b"]=>

ext/standard/tests/serialize/sleep_mangled_name_clash.phpt

@@ -12,5 +12,5 @@ $s = serialize(new Test);
 var_dump(str_replace("\0", '\0', $s));
 ?>
 --EXPECTF--
-Notice: serialize(): "priv" is returned from __sleep() multiple times in %s on line %d
+Warning: serialize(): "priv" is returned from __sleep() multiple times in %s on line %d
 string(37) "O:4:"Test":1:{s:10:"\0Test\0priv";N;}"

ext/standard/var.c

@@ -842,7 +842,7 @@ static int php_var_serialize_try_add_sleep_prop(
 	}
 
 	if (!zend_hash_add(ht, name, val)) {
-		php_error_docref(NULL, E_NOTICE,
+		php_error_docref(NULL, E_WARNING,
 			"\"%s\" is returned from __sleep() multiple times", ZSTR_VAL(error_name));
 		return SUCCESS;
 	}