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Account creation not prevented, but account was still not created
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Can someone explain why this filter report [1] indicates that no action was prevented (The account should have been created), but then

(1) MediaWiki says the account does not exist
(2) The CheckUser extension does list the account when showing the list of accounts on an IP.

Thank you.


Event Timeline

Elfix raised the priority of this task from to Needs Triage.
Elfix updated the task description. (Show Details)
Elfix added projects: AbuseFilter, CheckUser.
Elfix changed Security from none to None.
Elfix added a subscriber: Elfix.

It is still possible for an account creation to fail after the AddNewAccount/AbortNewAccount hooks (used by AF/CU) run. E.g. an external authentication systems rejects it for whatever reason, or the database write fails.

I wonder if we should provide a means for those extensions to detect this afterwards though.