[PHP 8.1] False error: "Readonly property is assigned outside of the constructor" while in __unserialize #6384
Description
Bug report
According to the RFC assigning readonly properties should be allowed in __unserialize method.
Code snippet that reproduces the problem
https://phpstan.org/r/baac0f50-da4d-47a7-83d2-95eb8a4ea4ac
PHP 8.1 just allows this, as stated per RFC, https://3v4l.org/53Dug#v8.1.1
Expected output
No error
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PR to solve it: