Tarfile extraction does not work on Windows

Using Python 3.10.5, there is a scenario where the extractall function of tarfile is causing an infinite loop for Python on Windows, but not in Linux.

The tar-file where the issue occurred was the one produced by docker export, where a file-system is saved as a tar file. Unfortunately, it is too big to upload here, so I will give some commands to get this file.

> docker create --name "testcontainer" tomcat
> docker export --output="testtomcat.tar" testcontainer

That should produce a file of about 457MB.

Now, using Python 3.10.5 under Windows, the following code-snippet will crash:

import tarfile
with tarfile.open("testtomcat.tar") as tarf:
     members_to_extract = [tar_info for tar_info in tarf.getmembers()
                                           if not tar_info.isdev()]
     tarf.extractall(path="/tmp/foo/", members=members_to_extract)

The error says: maximum recursion depth exceeded while calling a Python object

Your environment

• CPython versions tested on: Python 3.10.5
• Operating system and architecture: Windows 11 is where it failed, and it works fine with the same python version in Arch Linux with kernel Linux 5.15.58-2-lts x86_64

tarfile.extractall と、レポートに示されている members のフィルタリングから始め、次に docker create コマンドと docker export コマンドを使って Windows 上で動作を再現します。Linux 上で同じ Python バージョンを使った場合の展開結果と比較します。エクスポートされた tar アーカイブを、再帰深度の超過による失敗や無限ループなしに Windows 上で展開できれば完了です。