fix(node): Fix this context for vercel AI instrumentation
#17681
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size-limit report 📦
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node-overhead report 🧳Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.
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RulaKhaled
approved these changes
Sep 17, 2025
mydea
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that referenced
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Sep 17, 2025
I've seen a few places where we are wrapping things that could be sync
or async, and we want to do something with the return value. By adding
an onSuccess handler to `handelCallbackErrors` we can handle this more
generically in the future:
```js
const wrapped = handleCallbackErrors(
() => fn(),
// error handler
(_err) => {},
// finally handler
() => {},
// success handler, gets value or resolved value if function returns a promise
(_value) => {}
);
```
While scanning a bit for places where we could already use this, I also
found two bugs around this, opened separate PRs for them:
* #17680
* #17681
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Noticed while working on #17679, we incorrectly changed the
thiscontext here (which is also why TS complained).I rewrote this to a proxy which should keep the context properly.