this._flushOutcomes is not a function

[Tobi-mmt]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/nextjs

SDK Version

8.20.0

Framework Version

next 14.2.5

Link to Sentry event

https://farbenmeer.sentry.io/issues/5644981656/?environment=vercel-production&project=4504966587547648&query=is%3Aunresolved+issue.priority%3A%5Bhigh%2C+medium%5D&referrer=issue-stream&statsPeriod=14d&stream_index=0

Reproduction Example/SDK Setup

No response

Steps to Reproduce

The renovate bot updated the sentry/nextjs package 4 days ago. Exactly with that merge in our sentry issue overview an issue started and is now eskalating. Error is this._flushOutcomes is not a function. it comes from the sentry package.

What have we done?

1. upgrade existing app from 8.19.0 to 8.20.0
2. see error is sentry issue overview

Expected Result

no errors inside an sentry package

Actual Result

1.800 errors affecting +300 users.

[mydea]

hey, can you make sure that all Sentry packages are in sync in your lockfile - are all of the @sentry/xxx packages at v8.20.0?

[Tobi-mmt]

The package which is used in our code looks like that in the lockfile:

All that listed dependencies are pinned and so do point to the mentioned version 8.20. e.g. this one here:

There are of course also other packages which use sentry and they point to other versions, e.g. like lighthouse:

[mydea]

I think this is a depdendency resolution issue with the v6 version of Sentry that lighthouse pulls in, probably 🤔 I opened GoogleChrome/lighthouse#16131 to update this there.

For the time being, could you try to add a resolution for this to v8, something like this, in your package.json:

"overrides": {
     "@sentry/node: "^8.20.0"
   }