ConfigTrait _lookConfigElement throw error when request deep ref and not found

[abbadon1334]

core/src/ConfigTrait.php

Line 163 in c16bb75

if (!array_key_exists($el, $pos) && $create_elements) {

throw error : array_key_exists 2nd argument must be array

$this->config = [
'test' => 'something'
];

$this->getConfig('test/deep'); // <-- throw error

can we add a check if $pos is_array?

if(!is_array($pos))
{
return false;
}

[romaninsh]

sure why not...