Array argument not accepted as valid, how to fix?

[evs-xsarus]

I have this public class method:

    /**
     * Set a list of filter groups.
     *
     * @param \Magento\Framework\Api\Search\FilterGroup[] $filterGroups
     * @return $this
     */
    public function setFilterGroups(array $filterGroups = null);

and this calling code:

        $isActiveFilterGroup = $this->filterGroupBuilder
            ->addFilter($isActivefilter)
            ->create();

        /** @var \Magento\Framework\Api\Search\FilterGroup[] $filterGroups */
        $filterGroups = $searchCriteria->getFilterGroups();
        $filterGroups[] = $isActiveFilterGroup;

        $searchCriteria->setFilterGroups($filterGroups);

Where $isActiveFilterGroup is of type \Magento\Framework\Api\Search\FilterGroup and $filterGroups is assigned an array with instances of that same class.

How can I make PHP Stan accept this ? With 0.12.70 I get:

Parameter 1 $filterGroups of method Magento\Framework\Api\SearchCriteriaInterface::setFilterGroups() expects array<Magento\Framework\Api\Search\FilterGroup>|null, array given.

[ondrejmirtes]

Hi, can you reproduce the problem on phpstan.org? Thank you!

[ondrejmirtes]

Maybe some PHPStan extension is in effect that breaks this?

[evs-xsarus]

I have this one:

vendor/bitexpert/phpstan-magento/extension.neon

But when I disable it, I get even more errors.

[ondrejmirtes]

It's expected to get more errors, but does this specific error go away?

[evs-xsarus]

No, the error I've mentioned stays. I'll ask someone to look at it too.

[ondrejmirtes]

Try to create a minimal repository that still shows your problem.