[Regression] python 3.13.1 (vs 3.13.0): Defining iterator in a separate class no longer works in 3.13

[HinTak]

Description

Have two identical ci, https://github.com/kyamagu/skia-python/actions/runs/11829956181

(Sync main of fork with upstream)
https://github.com/HinTak/skia-python/actions/runs/12487829150

The latter fails on Apple Color Emoji font being missing.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 12
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

Success:
Current runner version: '2.320.0'
Operating System
macOS
13.7.1
22H221
Runner Image
Image: macos-13
Version: 20241108.324
Included Software: https://github.com/actions/runner-images/blob/macos-13/20241108.324/images/macos/macos-13-Readme.md
Image Release: https://github.com/actions/runner-images/releases/tag/macos-13%2F20241108.324
Runner Image Provisioner
2.0.384.1+6d6c56aa16f1b9c7dd7935df5d63980397e44def

Failure:
Current runner version: '2.321.0'
Operating System
macOS
13.7.2
22H313
Runner Image
Image: macos-13
Version: 20241216.479
Included Software: https://github.com/actions/runner-images/blob/macos-13/20241216.479/images/macos/macos-13-Readme.md
Image Release: https://github.com/actions/runner-images/releases/tag/macos-13%2F20241216.479
Runner Image Provisioner
2.0.404.1+573eac7f0cc07d6bb82d8b9bf5e1ffa69a554644

Is it regression?

Yes

Expected behavior

The Apple Color Emoji font is exported to be installed.

Actual behavior

Cannot find the Emoji font from the system

Repro steps

See the CI entries.

[HinTak]

It appears that between Version: 20241108.324 and Version: 20241216.479 , the Apple Color Emoji font has disappeared / not installed.

[susmitamane]

Hi @HinTak

We will look into the issue and keep you posted with updates.

Thank You.

[HinTak]

@susmitamane looking at the CI logs more carefully, it seems that the regression is specific to python 3.13 (works on 3.10/3.11/3.12)- I.e. skia-python loaded via python 3.13 on Intel mac 13 can't access apple color emoji. Has anything changes between the two images regarding its python 3.13 installation?

[HinTak]

Okay, the two runs differ by the python version - it is 3.13.0 in the successful run but 3.13.1 in the broken run.

[susmitamane]

Hi @HinTak

• https://docs.python.org/release/3.13.1/whatsnew/changelog.html.- The skia-python library may rely on Python's internal implementation of iteration or memory management, which could be impacted by Python 3.13.1.

• According to our early investigation, they have created some Skia.Iter modifications are causing an error. Please give us more time to investigate it and come back to you with clear inputs.

Thank you.

[HinTak]

@susmitamane thanks for your time. The skia.Iter code has not changed for at least 5 years, and the identical code works a few weeks ago (the two ci entry are simply one sync'ing the main of the other). Not sure why 3.13.0 to 3.13.1 on mac os x would break. Anyway, I am due to upgrade to 3.13.1 on my Linux desktop from 3.13.0 on the next reboot, too, so I should be able to tell whether 3.13.1 on Linux is affected.

[HinTak]

@susmitamane Just to let you know, I have upgraded python on my linux desktop to 3.13.1 from 3.13.0, and I can reproduce the issue on linux, so it is not specific for mac os x, but specific to 3.13.0 to 3.13.1 upgrade. Looking elsewhere, I think the issue is python/cpython#128161 .

[HinTak]

@susmitamane I am 100% sure the issue is python/cpython#128161 ; I shall let you to decide whether to close this, or leave this open so that other people having 3.13.0 to 3.13.1 problems can see an answer.

[themanofathousandfaces]

.

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