PyInterpreterState.config.int_max_str_digits Should Not Be Modified

PyConfig is for configuring the runtime during initialization, not for storing runtime state. Currently in sys.set_int_max_str_digits() we are modifying the interpreter's PyConfig directly.

That field should never be modified outside runtime init. Instead, the config value should be copied to a field on PyInterpreterState and that is what should be modified by sys (and used in longobject.c).

In fact, this is mostly what we were doing until a couple weeks ago (and what we still are doing in 3.11 and earlier). This was changed on main (3.12) in gh-96944. The fix is relatively trivial.

CC @gpshead

Linked PRs

• gh-152869

跟踪 sys.set_int_max_str_digits() 以及 PyConfig 和 PyInterpreterState 的定义，然后检查 longobject.c 对该限制的使用。将当前 main 分支的行为与 Python 3.11 以及相关的 gh-152869 工作进行比较。当运行时初始化将该值复制到解释器状态中，同时 sys 和 longobject.c 使用该状态而不修改 PyConfig 时，即视为完成。