Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Python 3.13 on Windows in GitHub Actions has started failing, with https://github.com/python-pillow/Pillow/actions/runs/7937029330/job/21673447008#step:25:535
The failure started with 3.13.0a4.
python/cpython#109922 leads me to believe that the 't' relates to builds without gil.
So I conclude that this problem has been reported as python/cpython#115545, which says
a5 is scheduled to be released on March 12. So this PR pins to a3 to allow our CIs to pass in the meantime.