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Check cases only for new users, not updates. New tests. - #4749
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adamsilverstein wants to merge 6 commits into
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adamsilverstein wants to merge 6 commits into
adamsilverstein wants to merge 6 commits into
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The check reverted in r55584 ran on every save, so updating a user whose username matches their own email, or who already collided with another user, failed. Usernames can only be set on insert, and emails are now compared against existing usernames only when they are new or changing, excluding the user being saved. Existing collisions are left alone, so no previously valid update starts failing. The same email-vs-username check is mirrored in register_new_user(), edit_user(), the REST users update endpoint and the profile email change confirmation, so users see a form error instead of a generic failure. Imports skip the checks, matching the existing email uniqueness check. Claude-Session: https://claude.ai/code/session_01XXGeBhJbUuzyPyZhFKKM5T
Data providers spell out which saves must be blocked and which must keep working, including the cases behind the r55584 revert: a user whose username is their own email, and users whose existing data already collides with another account. Collisions are seeded directly in the database to mirror sites that predate the check. Replaces the earlier single test, which covered only one update case. Claude-Session: https://claude.ai/code/session_01XXGeBhJbUuzyPyZhFKKM5T
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Trac ticket: https://core.trac.wordpress.org/ticket/57394
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