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• 1. The issue provides a
  minimal reproduction available on
  Stackblitz.
  • Please install the latest @envelop/* packages that you are using.
  • Please make sure the reproduction is as small as possible.
• 2. A failing test has been provided
• 3. A local solution has been provided
• 4. A pull request is pending review

Describe the bug

The useErrorHandler plugin does not check for incremental responses in the execution phase, so any errors that happen in incremental payloads are missed.

To Reproduce Steps to reproduce the behavior:

• Add @defer directive to schema
• Add useErrorHandler plugin that logs execution phase errors
• Query a field that throws an error with the @defer directive
• Error handler is never called

Stackblitz repro: https://stackblitz.com/edit/node-eeltu1?file=start.js

If you run npm run start, no errors will be logged. If the @defer directive is removed from the query, then it is logged.

Environment:

• OS: Mac
• NodeJS: 20.7.0
• @envelop/* versions:
  • @envelop/core: 5.0.0