VercelAI instrumentation causing `AI_NoOutputGeneratedError` on aborts

[raymondhechen]

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/node - express

SDK Version

10.12.0

Framework Version

Vercel AI SDK @ 5.0.44

Link to Sentry event

https://msgtomo.sentry.io/issues/6868408096/?environment=production&project=4509992631140352&query=is%3Aunresolved&referrer=issue-stream

Reproduction Example/SDK Setup

Calling streamText() with VercelAI default instrumentation enabled results in the following error:

This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason:
AI_NoOutputGeneratedError: No output generated. Check the stream for errors.

This does not always happen during generations, but I believe it particularly happens when the request gets aborted via abortSignal

Steps to Reproduce

1. Using @sentry/node with express instrumentation
2. Calling streamText()
3. Potentially abort request via abortSignal

Expected Result

Regular abort, no errors.

Actual Result

Additional Context

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[linear]

JS-949 VercelAI instrumentation causing `AI_NoOutputGeneratedError`

[raymondhechen]

Update, can reproduce specifically with the VercelAI instrumentation + aborting requests. This error does not happen when VercelAI instrumentation is disabled.

[Lms24]

Thanks for reporting! Gonna ask @RulaKhaled to take a look.

[RulaKhaled]

Hello @raymondhechen, thanks for reaching out. Do you mind sharing a small reproduction? I had no luck reproducing this so far