Bug report

This issue exists on 1.7.0

When using generics with string accessory types, the accessory types are lost:

Code snippet that reproduces the problem

https://phpstan.org/r/784f01e9-f48e-4bcb-89dc-a49cacb2c34e

Expected output

Expected to see array<non-empty-string, mixed> in the \PHPStan\dumpType output.

Did PHPStan help you today? Did it make you happy in any way?

PHPStan helps me everyday! congrats on the 1.7.0 release with fully static analysis, great work