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fix(core): Guard nullish response in supabase PostgREST handler - #20033
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The `.then()` success handler in `instrumentPostgRESTFilterBuilder` accessed `res.error` without a null guard, causing a crash when `res` is undefined (observed in React Native). This adds a guard matching the pattern already used in `instrumentAuthOperation`. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Address lint failures: use `res?.error` instead of `res && res.error`, and remove unused imports in the test file. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
antonis
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March 30, 2026 08:03
Lms24
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Good catch, thanks! Wasn't aware that a response from Supabase could be nullish but didn't think of the custom fetch implementation. Makes sense to guard for this!
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Closes#20032 ### Context: In the `supabaseIntegration`'s PostgREST instrumentation, the `.then()` success handler accesses `res.error` without checking if `res` is nullish first. This causes crashes in environments like React Native where the response can be `undefined`. A related error recently trended on the React Native SDK (see Linear comment) ### Summary: - Added a null guard on `res` before accessing `res.error` in `instrumentPostgRESTFilterBuilder`, changing `if (res.error)` to `if (res && res.error)` — matching the existing pattern used in `instrumentAuthOperation` - The existing `setHttpStatus` block already had a proper guard (`if (res && typeof res === 'object' && 'status' in res)`), so only the error-handling path was affected - Span `.end()` and breadcrumb creation continue to work correctly regardless of whether `res` is nullish - Added a new test file for the supabase integration covering the nullish response scenario and existing utility functions Before submitting a pull request, please take a look at our [Contributing](https://github.com/getsentry/sentry-javascript/blob/master/CONTRIBUTING.md) guidelines and verify: - [x] If you've added code that should be tested, please add tests. - [x] Ensure your code lints and the test suite passes (`yarn lint`) & (`yarn test`). - [x] Link an issue if there is one related to your pull request. If no issue is linked, one will be auto-generated and linked. --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Closes#20032
Context:
In the
supabaseIntegration's PostgREST instrumentation, the.then()success handler accessesres.errorwithout checking ifresis nullish first. This causes crashes in environments like React Native where the response can beundefined.A related error recently trended on the React Native SDK (see Linear comment)
Summary:
resbefore accessingres.errorininstrumentPostgRESTFilterBuilder, changingif (res.error)toif (res && res.error)— matching the existing pattern used ininstrumentAuthOperationsetHttpStatusblock already had a proper guard (if (res && typeof res === 'object' && 'status' in res)), so only the error-handling path was affected.end()and breadcrumb creation continue to work correctly regardless of whetherresis nullishBefore submitting a pull request, please take a look at our
Contributing guidelines and verify:
yarn lint) & (yarn test).