1--TEST-- 2Argument unpacking does not work with string keys (forward compatibility for named args) 3--FILE-- 4<?php 5 6set_error_handler(function($errno, $errstr) { 7 var_dump($errstr); 8}); 9 10try { 11 var_dump(...new ArrayIterator([1, 2, "foo" => 3, 4])); 12} catch (Error $ex) { 13 var_dump($ex->getMessage()); 14} 15 16?> 17--EXPECT-- 18string(68) "Cannot use positional argument after named argument during unpacking" 19