Worker::collect() should accept any callable, but only accepts \Closure objects

[dktapps]

Environment

• PHP: 7.2.2
• pthreads: 2bc4406
• OS: windows x64

Reproducing Code

function collector(Collectable $collectable) : bool{
	return $collectable->isGarbage();
}

class Work extends \Threaded{
	public function run(){
		sleep(1);
	}
}
$worker = new \Worker();
$worker->start();
$worker->stack(new Work());
while($worker->collect('collector'));
$worker->shutdown();

Expected Output

nothing

Actual Output

Fatal error: Uncaught TypeError: Argument 1 passed to Worker::collect() must be an instance of Closure, string given in pthreads-test.php:38
Stack trace:
#0 pthreads-test.php(38): Worker->collect('collector')
#1 {main}
  thrown in pthreads-test.php on line 38