Unexpected error when using ReflectionClass::newInstance() #15032

Bug report

As can be seen in below's code snippet, using ReflectionObject::newInstance() (inherited from ReflectionClass::newInstance()) with a template type leads to an error:

Function should return T of object but returns object

Code snippet that reproduces the problem

https://phpstan.org/r/387d0287-c0cb-4aca-86bf-13c4329df80b

Expected output

I wouldn't expect an error here, because the reflection was done on a specific object. Calling newInstance should return a new instance of this exact class (or fail).

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