The process_user_email method was replacing valid emails with random
@email.invalid addresses because the deduplication check treated a
user's own email as a duplicate.
The @emails hash is populated during import_users, so when
import_user_emails runs later, the check !@emails.has_key?(email) fails
for the user's own email, triggering the random_email fallback.
Updated the condition to allow an email if it belongs to the same user:
(!@emails.has_key?(email) || @emails[email] == user_id)
Ruben Oussoren
ba0a319dee