Calling `ZipFile.mkdir()` on a new `ZipInfo` object gets an attribute error

[danny0838]

Bug report

Bug description:

with zipfile.ZipFile(io.BytesIO(), 'w') as zh:
    zinfo = zipfile.ZipInfo('mydir/')
    zh.mkdir(zinfo)

The above code raises AttributeError: 'zipfile.ZipInfo' object has no attribute 'CRC'.

CPython versions tested on:

3.14

Operating systems tested on:

No response

Linked PRs

• gh-154174: Support fresh ZipInfo objects in ZipFile.mkdir #154198