The example output is different on my side:
<?php
/*
object(Threaded)#2 (11) {
["0"]=>
int(0)
["1"]=>
int(1)
["2"]=>
int(2)
["3"]=>
int(3)
["4"]=>
int(4)
["5"]=>
int(5)
["6"]=>
int(6)
["7"]=>
int(7)
["8"]=>
int(8)
["9"]=>
int(9)
["foo"]=>
string(3) "bar"
}
*/
?>
for
windows using
PHP_VERSION 5.6.11
php_pthreads-2.0.10-5.6-ts-vc11-x86.zip @ http://windows.php.net/downloads/pecl/releases/pthreads/2.0.10/
and
linux using
PHP_VERSION 5.6.10-1~dotdeb+zts+7.3
So $stdClass wont be merged.