Bug report

It seems that PHPStan 1.10 gets confused about the shape of array_chunk result when treatPhpDocTypesAsCertain: false is set.

Code snippet that reproduces the problem

https://phpstan.org/r/1bd0816f-6c2e-4979-910c-a6afcf50b9f2

Note that if I add \PHPStan\dumpType($val) before the if it reports the correct element type (in this case 0-10), but it still complains about the condition being false.

If I turn treatPhpDocTypesAsCertain back on the problem disappears as well. Which is a bit weird considering that there are no phpdocs in the code sample.

Expected output

No issue should be reported regardless of treatPhpDocTypesAsCertain.