处理递归限制时处理Python崩溃

Question

想象一下这段代码：

def a():
    try:
        a()
    except RecursionError:
        a()
a()

看起来该代码片段会递归且无限地运行

a

函数。 但真正发生的事情是：

1. 创建递归错误
2. 处理异常，因为你可以处理每一个异常
3. 重复做同样的事情 结果： python 崩溃并崩溃（这是我所知的任何方式都无法处理的，因为这不会引发错误，它崩溃 python 解释器

任何人都可以看到它引发了什么异常：

Fatal Python error: _Py_CheckRecursiveCall: Cannot recover from stack overflow.
Python runtime state: initialized

Current thread 0x00007f2e14fca180 (most recent call first):  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 5 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  File "<stdin>", line 3 in a
  ...
Aborted (core dumped)

Answer 1

为什么不增加系统递归限制呢？

import sys
sys.setrecursionlimit(1000000000)

Answer 2

对于 python 3.10+，代码不再使解释器崩溃，只是挂起它（这是预期的行为），但我在 changelog 中找不到任何有关它的信息。我发现的与递归相关的唯一更改是 bpo-41936。