Improve panic message on invalid handler returns #415
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If a handler returns `nil, nil`, we're going to panic during serialization. However, those stacktraces don't include any frames from the handler itself, so it's very difficult to determine what the problem is. This PR panics explicitly a bit earlier, so that we can include the procedure name in the error message. Fixes #405.
jchadwick-buf
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Dec 8, 2022
mfridman
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Dec 8, 2022
joshcarp
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Dec 8, 2022
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[](https://renovatebot.com) This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [github.com/bufbuild/connect-go](https://togithub.com/bufbuild/connect-go) | require | minor | `v1.3.1` -> `v1.4.1` | --- ### Release Notes <details> <summary>bufbuild/connect-go</summary> ### [`v1.4.1`](https://togithub.com/bufbuild/connect-go/releases/tag/v1.4.1) [Compare Source](https://togithub.com/bufbuild/connect-go/compare/v1.4.0...v1.4.1) <!-- Release notes generated using configuration in .github/release.yml at main --> #### What's Changed ##### Bugfixes - Ensure server reflection can always access protobuf descriptors by [@​joshcarp](https://togithub.com/joshcarp) in [https://github.com/bufbuild/connect-go/pull/418](https://togithub.com/bufbuild/connect-go/pull/418) - Don't clobber custom User-Agents by [@​akshayjshah](https://togithub.com/akshayjshah) in [https://github.com/bufbuild/connect-go/pull/423](https://togithub.com/bufbuild/connect-go/pull/423) **Full Changelog**: bufbuild/connect-go@v1.4.0...v1.4.1 ### [`v1.4.0`](https://togithub.com/bufbuild/connect-go/releases/tag/v1.4.0) [Compare Source](https://togithub.com/bufbuild/connect-go/compare/v1.3.2...v1.4.0) <!-- Release notes generated using configuration in .github/release.yml at main --> #### What's Changed ##### Enhancements - Improve panic message on invalid handler returns by [@​akshayjshah](https://togithub.com/akshayjshah) in [https://github.com/bufbuild/connect-go/pull/415](https://togithub.com/bufbuild/connect-go/pull/415) - Add support for Connect-Protocol-Version header by [@​akshayjshah](https://togithub.com/akshayjshah) in [https://github.com/bufbuild/connect-go/pull/416](https://togithub.com/bufbuild/connect-go/pull/416) #### Migration Notes As a consequence of [https://github.com/bufbuild/connect-go/pull/416](https://togithub.com/bufbuild/connect-go/pull/416), `connect-go` servers exposed to web browsers may need to amend their CORS configuration to add `Connect-Protocol-Version` to `Access-Control-Allow-Headers`. The [pull request description](https://togithub.com/bufbuild/connect-go/pull/416) explains the motivation for this additional header. **Full Changelog**: bufbuild/connect-go@v1.3.2...v1.4.0 ### [`v1.3.2`](https://togithub.com/bufbuild/connect-go/releases/tag/v1.3.2) [Compare Source](https://togithub.com/bufbuild/connect-go/compare/v1.3.1...v1.3.2) <!-- Release notes generated using configuration in .github/release.yml at main --> #### What's Changed ##### Bugfixes - Send gRPC error metadata only as HTTP trailers by [@​akshayjshah](https://togithub.com/akshayjshah) in [https://github.com/bufbuild/connect-go/pull/410](https://togithub.com/bufbuild/connect-go/pull/410) **Full Changelog**: bufbuild/connect-go@v1.3.1...v1.3.2 </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://app.renovatebot.com/dashboard#github/open-feature/flagd). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNC45Ny42IiwidXBkYXRlZEluVmVyIjoiMzQuOTcuNiJ9--> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
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If a handler returns
nil, nil, we're going to panic duringserialization. However, those stacktraces don't include any frames from
the handler itself, so it's very difficult to determine what the problem
is. This PR panics explicitly a bit earlier, so that we can include the
procedure name in the error message.
Fixes #405.