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v0.8.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 8de34cdb952a2e3b8d7a9a213845cad01a8cece3 authored by Pablo Galindo on 02 September 2020, 20:30:51 UTC, committed by GitHub on 02 September 2020, 20:30:51 UTC 
[3.9] bpo-41690: Use a loop to collect args in the parser instead of recursion (GH-22053) (GH-22067)
 
This program can segfault the parser by stack overflow:

```
import ast

code = "f(" + ",".join(['a' for _ in range(100000)]) + ")"
print("Ready!")
ast.parse(code)
```

the reason is that the rule for arguments has a simple recursion when collecting args:

args[expr_ty]:
    [...]
    | a=named_expression b=[',' c=args { c }] {
        [...] }.
(cherry picked from commit 4a97b1517a6b5ff22e2984b677a680b07ff0ce11)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
1 parent a763ee3
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Tip revision: 8de34cdb952a2e3b8d7a9a213845cad01a8cece3 authored by Pablo Galindo on 02 September 2020, 20:30:51 UTC
[3.9] bpo-41690: Use a loop to collect args in the parser instead of recursion (GH-22053) (GH-22067)
Tip revision: 8de34cd
CODE_OF_CONDUCT.md 
# Code of Conduct

Please note that all interactions on
[Python Software Foundation](https://www.python.org/psf-landing/)-supported
infrastructure is [covered](https://www.python.org/psf/records/board/minutes/2014-01-06/#management-of-the-psfs-web-properties)
by the [PSF Code of Conduct](https://www.python.org/psf/codeofconduct/),
which includes all the infrastructure used in the development of Python itself
(e.g. mailing lists, issue trackers, GitHub, etc.).

In general, this means that everyone is expected to be **open**, **considerate**, and
**respectful** of others no matter what their position is within the project.
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