If no options (or an empty array) is passed to attachByName then the following conditional will evaluate true.

if(range(0, count($options) - 1) != array_keys($options))

I propose altering the function to the following:

public function attachByName($name, $options = array(), $priority = self::DEFAULT_PRIORITY)
{
    if (!is_array($options)) {
        $options = (array) $options);
    } else {
        if ((count($options) > 0) && (range(0, count($options) - 1) != array_keys($options))) {
            $options = array($options);
        }
    }
    $filter = $this->broker($name, $options);
    return $this->attach($filter, $priority);
}

I will draw up a couple of tests when I get home tonight.

Based on your reproduce case, you've got incorrect structure in the array you're passing to the constructor of FilterChain. Each filter needs to be listed as an associative array itself:

$f = new \Zend\Filter\FilterChain(array(
    'filters' => array(
        array('name' => 'myFilter'),
    ),
));

When I do the above, I run into no issues whatsoever.

Cannot reproduce, and appears to be incorrect usage.

There's a typo within my original use case. I feel like an idiot now. :(

class myFilter extends \Zend\Filter\AbstractFilter {
    public function filter($text) {
        return 'test';
    }
}
class myFilterB extends \Zend\Filter\AbstractFilter {
    public function __construct() {}
    public function filter($text) {
        return 'filterB';
    }
}

$f = new \Zend\Filter\FilterChain(array(
        'filters' => array(
            array('name' => 'myFilterB'),
            array('name' => 'myFilter'),
        ),
));

results in the following stack trace: Fatal error: Uncaught exception 'ReflectionException' with message 'Class myFilter does not have a constructor, so you cannot pass any constructor arguments' in /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Loader/PluginBroker.php:191 Stack trace:

0 /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Loader/PluginBroker.php(191): ReflectionClass->newInstanceArgs(Array)

1 /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Loader/PluginSpecBroker.php(179): Zend\Loader\PluginBroker->load('myFilter', Array)

2 /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Filter/FilterChain.php(143): Zend\Loader\PluginSpecBroker->load('myFilter', Array)

3 /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Filter/FilterChain.php(188): Zend\Filter\FilterChain->broker('myFilter', Array)

4 /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Filter/FilterChain.php(97): Zend\Filter\FilterChain->attachByName('myFilter', Array, 1000)

5 /Users/ in /Users/shaunbramley/Downloads/ZendFramework-2.0.0dev3/library/Zend/Loader/PluginBroker.php on line 191

Is my use case not adhering to the intended usage? I see no difference in the the files between master and beta3.

Confirming this with the standard "Int" filter (master branch)

I'm able to reproduce this with the Int filter and the StripNewlines filter. The range function will generate an array with two empty value in it when the options variable is empty.

Reproduced.

I've got a PR in for this now: https://github.com/zendframework/zf2/pull/1128

PR #1128 merged to master, fixing the issue.