Checking for duplicate emails in user_requirements() does not take langcode into account

I just found this issue myself, I think it doesn't really matter to group by uid, but we definitely need to group by language.

I think we could add some additional coverage to UserRequirementsTest for this - might just be a case of adding some more data.

I added a test.

Test coverage added

1) Drupal\Tests\user\Kernel\UserRequirementsTest::testTranslatedUserEmail
Failed asserting that an array does not have the key 'conflicting emails'.
/builds/issue/drupal-3490639/core/modules/user/tests/src/Kernel/UserRequirementsTest.php:80
FAILURES!
Tests: 3, Assertions: 20, Failures: 1.

Fix itself seems pretty simple enough

LGTM

Confirmed changes in fork branch to the two core user files resolves the issue on a new Drupal 11.6 install with multiple languages.

The Needs Review Queue Bot → tested this issue. It no longer applies to Drupal core. Therefore, this issue status is now "Needs work".

This does not mean that the patch necessarily needs to be re-rolled or the MR rebased. Read the Issue Summary, the issue tags and the latest discussion here to determine what needs to be done.

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Rebased, restoring RTBC

Hi!
Any news on this issue?
We had the same problem on our Drupal with duplicated users

Committed to 11.x and backported to 11.2.x - thanks folks

larowlan → closed merge request !10396

Thanks @larowlan, could we backport this to 10.x too?

Hi @pcambra - I don't think it qualifies for allowed changes for a maintenance minor release → - but thanks for asking. If you feel otherwise, please comment with reasons and/or reach out on slack and we can discuss with release managers.

Fixing credits