Bug report

Hello,

Recent change in return type of sort causes following problem:
https://phpstan.org/r/da32d2f1-4f3c-476f-b381-c3a7775c03da

When line 8 is commented out, it works as expected. Sort now returns list as a type. Line 9 changes type to string. Therefore line 10 should not have any errors.

I think it breaks only if arrays have more dimensions like in the example.

Code snippet that reproduces the problem

https://phpstan.org/r/da32d2f1-4f3c-476f-b381-c3a7775c03da

Expected output

No errors

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