--TEST--
Ensure __autoload() is triggered during unserialization.
--FILE--
<?php
spl_autoload_register(function ($name) {
  echo "in autoload: $name\n";
});

var_dump(unserialize('O:1:"C":0:{}'));
?>
--EXPECTF--
in autoload: C
object(__PHP_Incomplete_Class)#%d (1) {
  ["__PHP_Incomplete_Class_Name"]=>
  string(1) "C"
}