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RustPython doesn't use GIL at all. RustPython use individual lock for each data type. So RustPython has more multithreading bugs.

You mean more multithreaded bugs are possible in the Python code that it's running, right? Not that RustPython itself has more multithreading bugs?

RustPython itself has more bugs. e.g. `dict()` doesn't work well on some multithread scenario yet.

Why does rust python need to use Gil

Is it an artificial artifact or is it necessary to make rust python work?