Send mail throws UnicodeEncodeError under python 3.11.9

Django Internals
1

Hi there!

We’re hitting a bug in production with django 4.2.11 and python 3.11.9 due to recent changes in python. I can see a fix for it on django github which is great.

But I can only see it attached to issue #34900 related to python 3.13, which will be supported by django 5.1. And I am wondering if it will be packed in the next patch release of 4.2 ?

That would be great because for now we stick to 3.11.8 as a workaround but it’s not ideal. Do I need to create a ticket for it to be added in the next patch release?

2

There are related back port issues for both 3.12 and 3.11, so it looks like we would need matching backports here too. //cc @nessita @sarahboyce

3

Thank you everyone, Sarah and I are actively looking into this, will update the post with details as we have them.

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4

Thanks, our pipeline wasn’t working anymore this week dued to the version 3.11.9 with this error. We locked to 3.11.8 and it was solved for now. Thanks!

5

An update on this topic:

  • Mariusz has updated the Python versions in Jenkins CI so we run the latest and are able to catch issues like this and also tests the fixes.
  • We’ll backport revision b231bcd19e57267ce1fc21d42d46f0b65fdcfcf8 to Django 5.0.5 and 4.2.12, with release date set for May 6th.
  • We have a PR that that will be merged soon which adds a test, and release notes to be backported to stable branches.

Thank you everyone!

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