Cannot declare class Composer\Autoload\ComposerStaticInit*

[JurJean]

If I spawn a thread I receive the following error:

PHP Fatal error: Cannot declare class Composer\Autoload\ComposerStaticInit9ddc8272b94b84d953a76ade264999aa, because the name is already in use in /var/www/vendor/composer/autoload_static.php on line 7
PHP Stack trace:
PHP 1. Icicle\Concurrent\Threading\Internal\Thread->run() /var/www/vendor/icicleio/concurrent/src/Threading/Internal/Thread.php:0
PHP 2. ComposerAutoloaderInit9ddc8272b94b84d953a76ade264999aa::getLoader() /var/www/vendor/icicleio/concurrent/src/Threading/Internal/Thread.php:71
PHP 3. require_once() /var/www/vendor/composer/autoload_real.php:28

I can imagine something has changed in the composer autoloader. I have the same results running the example.

[JurJean]

I can work around it by adding define('HHVM_VERSION', false); just before requiring of autoloader. This disables the static autoloader:

define('HHVM_VERSION', false); require 'vendor/autoload.php';