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Maniphest T403538

New Gravy JS Error not triggering our client side error API calls
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Description

We encountered a new Gravy production JS error today. We raised it with Gravy on Slack here

controller.4b4c84add282f3dc1ba9.js:363 

Uncaught TypeError: Cannot set properties of undefined (setting '_added')
    at handleAdd (controller.4b4c84add282f3dc1ba9.js:363:30)
    at 273.e6a2b9ab080bae5396ec.js:597:48
    at BroadcastChannel.<anonymous> (273.e6a2b9ab080bae5396ec.js:534:70)

This one is unusual as it's not triggering our client error API call (the thing that logs client-side errors). It's also not blocking transactions, which suggests it's not a serious bug, but still, we ideally want to know about these types of errors regardless of severity.

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StatusSubtypeAssignedTask
 OpenNoneT403769 Gr4vy Chaos Epic
 ResolvedAnnWFT403538 New Gravy JS Error not triggering our client side error API calls

Event Timeline

jgleeson created this task.Sep 2 2025, 8:12 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptSep 2 2025, 8:12 PM
AnnWF mentioned this in T403525: Investigate: Store Gravy local JS file locally for now until they have the lock version for us ready.Sep 2 2025, 8:17 PM
AKanji-WMF moved this task from Triage to Chaos Crew Backlog on the Fundraising-Backlog board.Sep 2 2025, 8:20 PM
jgleeson merged a task: T403611: New Gravy JS Errors (2nd Sept).Sep 3 2025, 12:08 PM
AnnWF claimed this task.Sep 4 2025, 4:24 PM
AnnWF moved this task from Backlog to In Progress on the Fundraising Tech - Chaos Crew board.Sep 4 2025, 4:53 PM
Cstone added a parent task: T403769: Gr4vy Chaos Epic.Sep 4 2025, 7:03 PM
AnnWF added a comment.Sep 8 2025, 7:00 PM

We were using window.onerror to catch uncaught errors and this one above (BroadcastChannel) is an async event, so not able to be controlled by us. Nothing we can do for this case.

AnnWF moved this task from In Progress to Ready for Review on the Fundraising Tech - Chaos Crew board.Sep 8 2025, 7:01 PM
AnnWF moved this task from Ready for Review to Done on the Fundraising Tech - Chaos Crew board.Sep 8 2025, 7:29 PM
XenoRyet closed this task as Resolved.Sep 8 2025, 7:33 PM
XenoRyet set Final Story Points to 1.
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