Subset of syncs are failing with, "Passed `nil` into T.must"

What to do

• Check whether you use Census Sync Engine. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 2h 19m it lasted.

  Anything that failed between 2025-11-12 17:41 UTC and 2025-11-12 20:01 UTC may need a replay.

• Subscribe to Census's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=census works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Census 4

1. identifiedNov 12, 2025, 5:41 PM UTC

   The issue has been identified and a fix is being implemented.

   provider

2. monitoringNov 12, 2025, 6:30 PM UTC

   The error impacting some customer syncs has now been resolved and syncs are recovering. The syncs impacted were runs with no new data changes to process. This happened due to a recent update that removed the part of our system that correctly handled "no change" scenarios. As a result, syncs without updates failed instead of completing successfully. Syncs with actual data changes were unaffected. We've rolled back the change, and all syncs are now running normally.

   provider

3. monitoringNov 12, 2025, 6:30 PM UTC

   The error impacting some customer syncs has now been resolved and syncs are recovering. The syncs impacted were runs with no new data changes to process. This happened due to a recent update that removed the part of our system that correctly handled "no change" scenarios. As a result, syncs without updates failed instead of completing successfully. Syncs with actual data changes were unaffected. We've rolled back the change, and all syncs are now running normally.

   provider

4. resolvedNov 12, 2025, 8:01 PM UTC

   This incident has been resolved.

   provider

Corrections

None so far.

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