Array Input has strange behaviour

[gsteel]

I would expect that using an ArrayInput with InputFilter to fail validation when given non-array input, but instead an exception is thrown.

Given that the whole idea is filtering and validation of untrusted input, causing a crash in this situation seems odd to me.

$inputFilter = new InputFilter();
$inputFilter->add([
    'type'       => ArrayInput::class,
    'validators' => [
        ['name' => NotEmptyValidator::class],
    ],
], 'myInput');

$inputFilter->setData(['myInput' => 'Whatever']); // Exception thrown here.
assert($inputFilter->isValid() === false);