fix(zstd): handle zero-literal BuildDict corpus by cyphercodes · Pull Request #1178 · klauspost/compress

cyphercodes · 2026-07-25T15:59:29Z

Summary

return a normal BuildDict error when a corpus produces sequences but no literals
add regression coverage for the fully-matchable corpus panic from zstd: BuildDict panics with "integer divide by zero" on a fully-matchable corpus (litTotal == 0) #1174

Fixes #1174

Test plan

GOTOOLCHAIN=go1.24.0 go test ./zstd -run 'TestBuildDict(FullyMatchableCorpusReturnsError|LevelPathsRoundTrip)' -count=1
git diff --check

Summary by CodeRabbit

Bug Fixes
- Dictionary building now stops with a clear error when the input contains no literals, instead of proceeding with empty literal data.
- Prevents unsafe behavior for fully matchable inputs by ensuring execution fails gracefully rather than panicking.
Tests
- Added a new test to confirm dictionary building returns an error for fully matchable input and that the error message includes “0 literals”.

coderabbitai · 2026-07-25T15:59:48Z

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: abdd4d18-5aae-4086-b1ba-d4647e0673fe

📥 Commits

Reviewing files that changed from the base of the PR and between 71bb6fd and 9cce06e.

📒 Files selected for processing (2)

zstd/dict.go
zstd/dict_test.go

🚧 Files skipped from review as they are similar to previous changes (2)

zstd/dict.go
zstd/dict_test.go

📝 Walkthrough

Walkthrough

BuildDict now returns an error when a corpus produces zero literals. A regression test verifies the error and confirms that the fully matchable corpus does not panic.

Changes

BuildDict zero-literal handling

Layer / File(s)	Summary
Zero-literal validation and regression test `zstd/dict.go`, `zstd/dict_test.go`	`BuildDict` returns a `"0 literals found"` error when `litTotal` is zero. The test verifies the error and guards against a panic.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

klauspost/compress#1184: Both PRs modify BuildDict and tests for literal-free corpora.

Suggested reviewers: klauspost

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly describes the main fix: handling zero-literal corpus in BuildDict, which matches the code change adding an error return.
Linked Issues check	✅ Passed	The PR fully addresses issue `#1174` by returning an error when litTotal is zero, preventing the panic and enabling graceful failure.
Out of Scope Changes check	✅ Passed	Both file changes (dict.go and dict_test.go) are directly scoped to fixing the zero-literal BuildDict panic reported in `#1174`.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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klauspost · 2026-08-05T09:58:47Z

@cyphercodes PTAL at go fix and conflict. Thanks!

coderabbitai · 2026-08-05T13:45:17Z

Note

GitHub couldn't provide a complete incremental comparison for this pull request, so CodeRabbit is performing a full review instead. This review may take a little longer.

cyphercodes · 2026-08-05T13:45:23Z

Resolved the conflict with current master and applied the go fix update (for range 32).

Verification run locally with Go 1.26.5:

diff <(gofmt -d .) <(printf "")
diff <(go fix -diff ./...) <(printf "")
go test ./zstd -run "TestBuildDict(FullyMatchableCorpusReturnsError|HomogeneousCorpusValidOffsets|LevelPathsRoundTrip)$" -count=1
go test ./zstd -count=1

klauspost · 2026-08-05T13:50:49Z

Thanks. I will see if I can get #1177 in and do a bugfix release before adding features.

…804) This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [github.com/klauspost/compress](https://github.com/klauspost/compress) | `v1.19.1` → `v1.19.2` | ![age](https://developer.mend.io/api/mc/badges/age/go/github.com%2fklauspost%2fcompress/v1.19.2?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/go/github.com%2fklauspost%2fcompress/v1.19.1/v1.19.2?slim=true) | --- ### Release Notes <details> <summary>klauspost/compress (github.com/klauspost/compress)</summary> ### [`v1.19.2`](https://github.com/klauspost/compress/releases/tag/v1.19.2) [Compare Source](klauspost/compress@v1.19.1...v1.19.2) #### What's Changed - huff0: add arm64 assembly for Decompress4X/1X via avo lowering by [@lizthegrey](https://github.com/lizthegrey) in [#1172](klauspost/compress#1172) - zstd: Re-enable unsafe decodeSync memory copies ([#1168](klauspost/compress#1168)) by [@lizthegrey](https://github.com/lizthegrey) in [#1171](klauspost/compress#1171) - zstd: fix arm64 asm frame offsets placing locals on the saved LR slot by [@lizthegrey](https://github.com/lizthegrey) in [#1176](klauspost/compress#1176) - zstd: avoid racing MaxDecodedSize write on shared dict litEnc by [@zanarellidev](https://github.com/zanarellidev) in [#1182](klauspost/compress#1182) - zstd: keep BuildDict recent-offsets positive and loadable by [@zanarellidev](https://github.com/zanarellidev) in [#1184](klauspost/compress#1184) - zstd: handle zero-literal BuildDict corpus by [@cyphercodes](https://github.com/cyphercodes) in [#1178](klauspost/compress#1178) - zstd: don't clear the registered dictionary when decoding past the window by [@sueun-dev](https://github.com/sueun-dev) in [#1177](klauspost/compress#1177) #### New Contributors - [@zanarellidev](https://github.com/zanarellidev) made their first contribution in [#1183](klauspost/compress#1183) - [@cyphercodes](https://github.com/cyphercodes) made their first contribution in [#1178](klauspost/compress#1178) - [@sueun-dev](https://github.com/sueun-dev) made their first contribution in [#1177](klauspost/compress#1177) **Full Changelog**: <klauspost/compress@v1.19.1...v1.19.2> </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - Between 12:00 AM and 03:59 AM (`* 0-3 * * *`) - Automerge - Between 12:00 AM and 03:59 AM (`* 0-3 * * *`) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **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. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate).  Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/13804 Reviewed-by: Mathieu Fenniak <mfenniak@noreply.codeberg.org>

…p ci] Bumps the go-modules group in /e2e-go with 6 updates: | Package | From | To | | --- | --- | --- | | [github.com/klauspost/compress](https://github.com/klauspost/compress) | `1.19.1` | `1.19.2` | | [github.com/moby/go-archive](https://github.com/moby/go-archive) | `0.3.2` | `0.3.3` | | [go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp](https://github.com/open-telemetry/opentelemetry-go-contrib) | `0.69.0` | `0.70.0` | | [go.opentelemetry.io/otel](https://github.com/open-telemetry/opentelemetry-go) | `1.44.0` | `1.45.0` | | [go.opentelemetry.io/otel/metric](https://github.com/open-telemetry/opentelemetry-go) | `1.44.0` | `1.45.0` | | [go.opentelemetry.io/otel/trace](https://github.com/open-telemetry/opentelemetry-go) | `1.44.0` | `1.45.0` | Updates `github.com/klauspost/compress` from 1.19.1 to 1.19.2 Release notes *Sourced from [github.com/klauspost/compress's releases](https://github.com/klauspost/compress/releases).* > v1.19.2 > ------- > > What's Changed > -------------- > > * huff0: add arm64 assembly for Decompress4X/1X via avo lowering by [`@lizthegrey`](https://github.com/lizthegrey) in [klauspost/compress#1172](https://redirect.github.com/klauspost/compress/pull/1172) > * zstd: Re-enable unsafe decodeSync memory copies ([#1168](https://redirect.github.com/klauspost/compress/issues/1168)) by [`@lizthegrey`](https://github.com/lizthegrey) in [klauspost/compress#1171](https://redirect.github.com/klauspost/compress/pull/1171) > * zstd: fix arm64 asm frame offsets placing locals on the saved LR slot by [`@lizthegrey`](https://github.com/lizthegrey) in [klauspost/compress#1176](https://redirect.github.com/klauspost/compress/pull/1176) > * zstd: avoid racing MaxDecodedSize write on shared dict litEnc by [`@zanarellidev`](https://github.com/zanarellidev) in [klauspost/compress#1182](https://redirect.github.com/klauspost/compress/pull/1182) > * zstd: keep BuildDict recent-offsets positive and loadable by [`@zanarellidev`](https://github.com/zanarellidev) in [klauspost/compress#1184](https://redirect.github.com/klauspost/compress/pull/1184) > * zstd: handle zero-literal BuildDict corpus by [`@cyphercodes`](https://github.com/cyphercodes) in [klauspost/compress#1178](https://redirect.github.com/klauspost/compress/pull/1178) > * zstd: don't clear the registered dictionary when decoding past the window by [`@sueun-dev`](https://github.com/sueun-dev) in [klauspost/compress#1177](https://redirect.github.com/klauspost/compress/pull/1177) > > New Contributors > ---------------- > > * [`@zanarellidev`](https://github.com/zanarellidev) made their first contribution in [klauspost/compress#1183](https://redirect.github.com/klauspost/compress/pull/1183) > * [`@cyphercodes`](https://github.com/cyphercodes) made their first contribution in [klauspost/compress#1178](https://redirect.github.com/klauspost/compress/pull/1178) > * [`@sueun-dev`](https://github.com/sueun-dev) made their first contribution in [klauspost/compress#1177](https://redirect.github.com/klauspost/compress/pull/1177) > > **Full Changelog**: <https://github.com/klauspost/compress/compare/v1.19.1...v1.19.2> Commits * [`c3b3439`](https://github.com/klauspost/compress/commit/c3b3439a48196b5082c63252bfb8633d0a2faad4) zstd: don't clear the registered dictionary when decoding past the window ([#1](https://redirect.github.com/klauspost/compress/issues/1)... * [`9874bc9`](https://github.com/klauspost/compress/commit/9874bc9073f350ce462becb84f9a23c3e828d03f) fix(zstd): handle zero-literal BuildDict corpus ([#1178](https://redirect.github.com/klauspost/compress/issues/1178)) * [`71bb6fd`](https://github.com/klauspost/compress/commit/71bb6fd9ddbfbb2ca6612542a916c766a866bfb3) zstd: keep BuildDict recent-offsets positive and loadable ([#1184](https://redirect.github.com/klauspost/compress/issues/1184)) * [`3d4dacb`](https://github.com/klauspost/compress/commit/3d4dacbaa9faca75caacc35b6d75731a81a92c6b) zstd: avoid racing MaxDecodedSize write on shared dict litEnc ([#1182](https://redirect.github.com/klauspost/compress/issues/1182)) * [`3ceaa81`](https://github.com/klauspost/compress/commit/3ceaa81409aabe39c71821b936155b33471c78d8) build(deps): bump the github-actions group with 5 updates ([#1185](https://redirect.github.com/klauspost/compress/issues/1185)) * [`72cb4d3`](https://github.com/klauspost/compress/commit/72cb4d3e8e743bea5d1ba40896ad55214a1844e4) chore: add OpenSSF Scorecard GitHub Action ([#1183](https://redirect.github.com/klauspost/compress/issues/1183)) * [`69c9db4`](https://github.com/klauspost/compress/commit/69c9db420ae55bfcdfbef564805e2646206545f7) zstd: fix arm64 asm locals overwriting the saved link register ([#1176](https://redirect.github.com/klauspost/compress/issues/1176)) * [`117430d`](https://github.com/klauspost/compress/commit/117430d3b0e3c39c14d32fe7c90652149a78e609) zstd: Re-enable unsafe decodeSync memory copies ([#1168](https://redirect.github.com/klauspost/compress/issues/1168)) ([#1171](https://redirect.github.com/klauspost/compress/issues/1171)) * [`c73af0c`](https://github.com/klauspost/compress/commit/c73af0c12cc767386af8388f30d5aa7428e6dfc8) huff0: add arm64 assembly for Decompress4X/1X via avo lowering ([#1172](https://redirect.github.com/klauspost/compress/issues/1172)) * See full diff in [compare view](https://github.com/klauspost/compress/compare/v1.19.1...v1.19.2) Updates `github.com/moby/go-archive` from 0.3.2 to 0.3.3 Release notes *Sourced from [github.com/moby/go-archive's releases](https://github.com/moby/go-archive/releases).* > v0.3.3 > ------ > > What's Changed > -------------- > > * Fix a regression introduced in v0.3.0 that caused archive extraction to reject hardlinks with absolute targets, as produced by > some image builders. Absolute hardlink targets are now resolved relative to the extraction root, while paths that escape the root > remain rejected. [moby/go-archive#100](https://redirect.github.com/moby/go-archive/pull/100) > * Fix a regression introduced in v0.3.0 that caused archive extraction to fail when applying permissions to device nodes, including > nodes on `nodev` filesystems and `dev/ptmx`. Device nodes are now referenced without opening the underlying device before applying > their mode. [moby/go-archive#103](https://redirect.github.com/moby/go-archive/pull/103) > * Set close-on-exec on file descriptors used by the Linux permission fallback to prevent them from leaking into child processes. > [moby/go-archive#104](https://redirect.github.com/moby/go-archive/pull/104) > > **Full Changelog**: <https://github.com/moby/go-archive/compare/v0.3.2...v0.3.3> Commits * [`ae9e219`](https://github.com/moby/go-archive/commit/ae9e219f7104d91e262055a29bae1f9753106981) Merge pull request [#104](https://redirect.github.com/moby/go-archive/issues/104) from thaJeztah/use\_O\_CLOEXEC * [`98ff1da`](https://github.com/moby/go-archive/commit/98ff1dac11141c20bf7975ee1243fbe5031c2684) archive: set close-on-exec for chmod fallback descriptors * [`1e8dfbc`](https://github.com/moby/go-archive/commit/1e8dfbc6ec14614f009716c5ec04b6d104168201) Merge pull request [#103](https://redirect.github.com/moby/go-archive/issues/103) from thaJeztah/fix\_chmod\_fallback * [`e738eed`](https://github.com/moby/go-archive/commit/e738eed524c260a613bea37a47349e0f7d0a45a6) archive: keep procfs file alive during fchmodat * [`2d863f5`](https://github.com/moby/go-archive/commit/2d863f57793b7e2340cfca8f9a94a2d55cf7e68e) archive: preserve procfs access during chroot extraction * [`89653ed`](https://github.com/moby/go-archive/commit/89653edcda61f24e83ae2aa485f57cf762c59568) archive: fix chmod fallback for device nodes on nodev mounts * [`f37d413`](https://github.com/moby/go-archive/commit/f37d413855106b6c4f5cc3c063013869b6294e7d) Merge pull request [#106](https://redirect.github.com/moby/go-archive/issues/106) from thaJeztah/fallback\_no\_read * [`4ffc915`](https://github.com/moby/go-archive/commit/4ffc91517ffd9b77b11efd91768b5d6d4303a3b6) archive: test chmod fallback without read permission * [`9af1c40`](https://github.com/moby/go-archive/commit/9af1c40d9b972e82affd0b3ed3beb3f5d4d5f5d2) Merge pull request [#105](https://redirect.github.com/moby/go-archive/issues/105) from thaJeztah/test\_chrooted\_chmod\_fallback * [`3daca2a`](https://github.com/moby/go-archive/commit/3daca2abcac72471e1424cc840e7c5711937ade9) archive: test chmod fallback without procfs in chroot * Additional commits viewable in [compare view](https://github.com/moby/go-archive/compare/v0.3.2...v0.3.3) Updates `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp` from 0.69.0 to 0.70.0 Release notes *Sourced from [go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp's releases](https://github.com/open-telemetry/opentelemetry-go-contrib/releases).* > Release v1.45.0/v2.5.2/v0.70.0/v0.37.2/v0.25.0/v0.20.0/v0.16.2/v0.17.0 > ---------------------------------------------------------------------- > > Overview > -------- > > ### Added > > * Add `go.opentelemetry.io/contrib/detectors/ibmcloud/vpc`, a new resource detector for IBM Cloud VPC virtual server instances, ported from `github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourcedetectionprocessor/internal/ibmcloud/vpc`. Detects `cloud.provider`, `cloud.platform`, `cloud.region`, `cloud.availability_zone`, `cloud.account.id`, `cloud.resource_id`, `host.id`, `host.image.id`, `host.image.name`, `host.name`, and `host.type`. ([#9011](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9011)) > * Add `go.opentelemetry.io/contrib/detectors/k8sapi`, a new resource detector that queries the Kubernetes API. Detects `k8s.node.name` and `k8s.node.uid` when `K8S_NODE_NAME` is set via the downward API, and `k8s.cluster.uid` derived from the kube-system namespace UID (works on any Kubernetes distribution). ([#9108](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9108)) > * Add new `elasticbeanstalk` resource detector for AWS Elastic Beanstalk, ported from `processor/resourcedetectionprocessor/internal/aws/elasticbeanstalk` in opentelemetry-collector-contrib. ([#8993](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8993)) > * The resource created by `go.opentelemetry.io/contrib/otelconf` now includes [default SDK attributes](https://pkg.go.dev/go.opentelemetry.io/otel/sdk/resource#Default). ([#8990](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8990)) > * Add support for the `aws.ecs` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#8915](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8915)) > * Add support for the `aws.eks` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#9138](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9138)) > * Add support for the `azure.vm` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#9074](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9074)) > * Add support for the `gcp` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#9137](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9137)) > * Add `go.opentelemetry.io/contrib/detectors/azure/azureappservice`, a new resource detector for Azure App Service. Detects `cloud.*`, `service.name`, `azure.resource_group.name`, `azure.app_service.instance.id`, and `deployment.environment.name` from the `WEBSITE_*` and `REGION_NAME` environment variables. ([#9289](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9289)) > * Add `azurecontainerapps` resource detector for Azure Container Apps. ([#8939](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8939)) > * Add `go.opentelemetry.io/contrib/detectors/azure/azurefunctions`, a new resource detector for Azure Functions. Detects `cloud.*`, `service.name`, `azure.resource_group.name`, `faas.instance`, and `deployment.environment.name` from the `FUNCTIONS_*`, `WEBSITE_*`, `CONTAINER_NAME`, and `REGION_NAME` environment variables. ([#9290](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9290)) > * Add `NewResourceDetector` along with the `WithAttributeFilter` and `WithTagKeyFilter` options in `go.opentelemetry.io/contrib/detectors/azure/azurevm`. `WithAttributeFilter` restricts the returned resource to the attributes the filter accepts. `WithTagKeyFilter` opts in to `azure.tag.<name>` attributes for the VM tags whose keys satisfy the provided predicate; no VM tags are emitted without it. ([#9162](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9162)) > * Add `go.opentelemetry.io/contrib/detectors/vultr` — a new resource detector for Vultr Cloud Compute instances, ported from `processor/resourcedetectionprocessor/internal/vultr` in `opentelemetry-collector-contrib`. Detects `cloud.provider`, `cloud.platform`, `cloud.region`, `host.id`, and `host.name`. ([#8995](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8995)) > > ### Changed > > * Upgrade `go.opentelemetry.io/otel/semconv` to `v1.43.0`, including updates across instrumentation and detector modules. > See [semantic-conventions v1.43.0 release](https://github.com/open-telemetry/semantic-conventions/releases/tag/v1.43.0) for complete details. ([#9337](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9337)) > * Upgrade `go.opentelemetry.io/otel/semconv` to `v1.42.0`, including updates across instrumentation and detector modules. > See [semantic-conventions v1.42.0 release](https://github.com/open-telemetry/semantic-conventions/releases/tag/v1.42.0) for complete details. ([#9196](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9196)) > * Use direct normalized-key lookups in `Carrier.Get` and `Carrier.Keys` in `go.opentelemetry.io/contrib/propagators/envcar`. ([#9112](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9112)) > * Update log bridge conversions to use attribute key-values instead of the removed log key-values in `go.opentelemetry.io/contrib/bridges/otellogr`, `go.opentelemetry.io/contrib/bridges/otellogrus`, `go.opentelemetry.io/contrib/bridges/otelslog`, and `go.opentelemetry.io/contrib/bridges/otelzap`. ([#9180](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9180)) > * The `Version()` function in `go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux` has been replaced by `const Version`. ([#9076](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9076)) > * Set `error.type` attribute instead of adding `exception` span events in `go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin`. ([#8977](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8977)) > * Prefer the gRPC dial target over the resolved peer IP for the `server.address` and `server.port` attributes in `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc`. ([#8904](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8904)) > * The detector in `go.opentelemetry.io/contrib/detectors/azure/azurevm` now also detects `cloud.account.id`, `cloud.availability_zone`, `azure.vm.name`, `azure.vm.size`, `azure.vm.scaleset.name`, and `azure.resource_group.name`, and prefers `osProfile.computerName` for `host.name` (falling back to the VM name), reconciling it with the collector-contrib Azure resource detector. ([#9162](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9162)) > > ### Fixed > > * Fix Prometheus reader resource label filter configuration in `go.opentelemetry.io/contrib/otelconf/v0.2.0`. ([#9062](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9062)) > * Apply `resource.detection/development.attributes.included` and `excluded` filtering to resource detector attributes in `go.opentelemetry.io/contrib/otelconf/x`. ([#9131](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9131)) > * Honor the context configured with `WithContext` when constructing resources in `go.opentelemetry.io/contrib/otelconf` and `go.opentelemetry.io/contrib/otelconf/x`. ([#9160](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9160)) > * Handle nil response bodies from custom `RoundTripper` implementations in `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp` without panicking. ([#9184](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9184)) > * Fix incorrect (overestimated) sum calculation for runtime histograms in `go.opentelemetry.io/contrib/instrumentation/runtime`. ([#9063](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9063)) > * Fix `Severity.UnmarshalText` round trip for positive `FATAL` offsets above the named range in `go.opentelemetry.io/contrib/processors/minsev`. ([#9197](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9197)) > * Reduce binary size by fetching ConfigMaps via `rest.HTTPClientFor` instead of the Kubernetes clientset in `go.opentelemetry.io/contrib/detectors/aws/eks`. ([#9284](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9284)) > * `TextMapPropagator` in `go.opentelemetry.io/contrib/propagators/autoprop` returns the no-op propagator for empty input, matching the behavior of `none`. An unknown `OTEL_PROPAGATORS` value still returns an error with a nil propagator so `NewTextMapPropagator` falls back to the default TraceContext and Baggage propagators instead of disabling propagation. ([#9163](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9163)) > * Preserve error-valued attributes nested in a group as grouped attributes instead of silently dropping them in `go.opentelemetry.io/contrib/bridges/otelslog`. ([#9238](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9238)) > * Fix a data race in `go.opentelemetry.io/contrib/bridges/otelslog` where concurrent `Handle` calls could corrupt each other's log attributes because `kvBuffer.KeyValues` returned a slice aliasing a shared buffer. ([#9229](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9229)) > * Avoid a panic in `go.opentelemetry.io/contrib/bridges/otelzap` when a malformed error field contains a nil or non-error value. ([#9068](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9068)) > * Use `azure.container_app.instance.id` instead of `service.instance.id` for the replica name detected by `go.opentelemetry.io/contrib/detectors/azure/azurecontainerapps`. ([#9208](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9208)) > * Preserve the underlying metadata errors returned with partial resources from `go.opentelemetry.io/contrib/detectors/gcp`. ([#9069](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9069)) > * Copy `MultipartForm` back to the request `otelmux.Middleware` was given after the wrapped handler returns, so `net/http` can find and remove the temp files `ParseMultipartForm` created on the context-derived request copy, when `otelmux.Middleware` wraps a handler directly, in `go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux`. This does not cover a handler panic, nor the common `router.Use(...)` integration, where `gorilla/mux`'s own routing step makes an additional request copy the middleware cannot write back through; see [gorilla/mux#777](https://redirect.github.com/gorilla/mux/pull/777). ([#9361](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9361)) > * Report the `b3` header from `Fields()` for the default `B3Unspecified` single-header injection encoding, matching what `Inject` writes, in `go.opentelemetry.io/contrib/propagators/b3`. ([#9273](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9273)) > * Fix `go.opentelemetry.io/contrib/propagators/aws/xray` producing deterministic trace and span IDs when the seed read from `crypto/rand` silently failed, by switching to `math/rand/v2`'s concurrency-safe top-level generator. ([#9359](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9359)) ... (truncated) Changelog *Sourced from [go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp's changelog](https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/CHANGELOG.md).* > [1.45.0/2.5.2/0.70.0/0.37.2/0.25.0/0.20.0/0.16.2/0.17.0] - 2026-08-03 > --------------------------------------------------------------------- > > ### Added > > * Add `go.opentelemetry.io/contrib/detectors/ibmcloud/vpc`, a new resource detector for IBM Cloud VPC virtual server instances, ported from `github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourcedetectionprocessor/internal/ibmcloud/vpc`. Detects `cloud.provider`, `cloud.platform`, `cloud.region`, `cloud.availability_zone`, `cloud.account.id`, `cloud.resource_id`, `host.id`, `host.image.id`, `host.image.name`, `host.name`, and `host.type`. ([#9011](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9011)) > * Add `go.opentelemetry.io/contrib/detectors/k8sapi`, a new resource detector that queries the Kubernetes API. Detects `k8s.node.name` and `k8s.node.uid` when `K8S_NODE_NAME` is set via the downward API, and `k8s.cluster.uid` derived from the kube-system namespace UID (works on any Kubernetes distribution). ([#9108](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9108)) > * Add new `elasticbeanstalk` resource detector for AWS Elastic Beanstalk, ported from `processor/resourcedetectionprocessor/internal/aws/elasticbeanstalk` in opentelemetry-collector-contrib. ([#8993](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8993)) > * The resource created by `go.opentelemetry.io/contrib/otelconf` now includes [default SDK attributes](https://pkg.go.dev/go.opentelemetry.io/otel/sdk/resource#Default). ([#8990](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8990)) > * Add support for the `aws.ecs` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#8915](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8915)) > * Add support for the `aws.eks` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#9138](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9138)) > * Add support for the `azure.vm` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#9074](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9074)) > * Add support for the `gcp` resource detector in `go.opentelemetry.io/contrib/otelconf/x`. ([#9137](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9137)) > * Add `go.opentelemetry.io/contrib/detectors/azure/azureappservice`, a new resource detector for Azure App Service. Detects `cloud.*`, `service.name`, `azure.resource_group.name`, `azure.app_service.instance.id`, and `deployment.environment.name` from the `WEBSITE_*` and `REGION_NAME` environment variables. ([#9289](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9289)) > * Add `azurecontainerapps` resource detector for Azure Container Apps. ([#8939](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8939)) > * Add `go.opentelemetry.io/contrib/detectors/azure/azurefunctions`, a new resource detector for Azure Functions. Detects `cloud.*`, `service.name`, `azure.resource_group.name`, `faas.instance`, and `deployment.environment.name` from the `FUNCTIONS_*`, `WEBSITE_*`, `CONTAINER_NAME`, and `REGION_NAME` environment variables. ([#9290](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9290)) > * Add `NewResourceDetector` along with the `WithAttributeFilter` and `WithTagKeyFilter` options in `go.opentelemetry.io/contrib/detectors/azure/azurevm`. `WithAttributeFilter` restricts the returned resource to the attributes the filter accepts. `WithTagKeyFilter` opts in to `azure.tag.<name>` attributes for the VM tags whose keys satisfy the provided predicate; no VM tags are emitted without it. ([#9162](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9162)) > * Add `go.opentelemetry.io/contrib/detectors/vultr` — a new resource detector for Vultr Cloud Compute instances, ported from `processor/resourcedetectionprocessor/internal/vultr` in `opentelemetry-collector-contrib`. Detects `cloud.provider`, `cloud.platform`, `cloud.region`, `host.id`, and `host.name`. ([#8995](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8995)) > > ### Changed > > * Upgrade `go.opentelemetry.io/otel/semconv` to `v1.43.0`, including updates across instrumentation and detector modules. > See [semantic-conventions v1.43.0 release](https://github.com/open-telemetry/semantic-conventions/releases/tag/v1.43.0) for complete details. ([#9337](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9337)) > * Upgrade `go.opentelemetry.io/otel/semconv` to `v1.42.0`, including updates across instrumentation and detector modules. > See [semantic-conventions v1.42.0 release](https://github.com/open-telemetry/semantic-conventions/releases/tag/v1.42.0) for complete details. ([#9196](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9196)) > * Use direct normalized-key lookups in `Carrier.Get` and `Carrier.Keys` in `go.opentelemetry.io/contrib/propagators/envcar`. ([#9112](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9112)) > * Update log bridge conversions to use attribute key-values instead of the removed log key-values in `go.opentelemetry.io/contrib/bridges/otellogr`, `go.opentelemetry.io/contrib/bridges/otellogrus`, `go.opentelemetry.io/contrib/bridges/otelslog`, and `go.opentelemetry.io/contrib/bridges/otelzap`. ([#9180](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9180)) > * The `Version()` function in `go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux` has been replaced by `const Version`. ([#9076](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9076)) > * Set `error.type` attribute instead of adding `exception` span events in `go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin`. ([#8977](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8977)) > * Prefer the gRPC dial target over the resolved peer IP for the `server.address` and `server.port` attributes in `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc`. ([#8904](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/8904)) > * The detector in `go.opentelemetry.io/contrib/detectors/azure/azurevm` now also detects `cloud.account.id`, `cloud.availability_zone`, `azure.vm.name`, `azure.vm.size`, `azure.vm.scaleset.name`, and `azure.resource_group.name`, and prefers `osProfile.computerName` for `host.name` (falling back to the VM name), reconciling it with the collector-contrib Azure resource detector. ([#9162](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9162)) > > ### Fixed > > * Fix Prometheus reader resource label filter configuration in `go.opentelemetry.io/contrib/otelconf/v0.2.0`. ([#9062](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9062)) > * Apply `resource.detection/development.attributes.included` and `excluded` filtering to resource detector attributes in `go.opentelemetry.io/contrib/otelconf/x`. ([#9131](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9131)) > * Honor the context configured with `WithContext` when constructing resources in `go.opentelemetry.io/contrib/otelconf` and `go.opentelemetry.io/contrib/otelconf/x`. ([#9160](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9160)) > * Handle nil response bodies from custom `RoundTripper` implementations in `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp` without panicking. ([#9184](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9184)) > * Fix incorrect (overestimated) sum calculation for runtime histograms in `go.opentelemetry.io/contrib/instrumentation/runtime`. ([#9063](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9063)) > * Fix `Severity.UnmarshalText` round trip for positive `FATAL` offsets above the named range in `go.opentelemetry.io/contrib/processors/minsev`. ([#9197](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9197)) > * Reduce binary size by fetching ConfigMaps via `rest.HTTPClientFor` instead of the Kubernetes clientset in `go.opentelemetry.io/contrib/detectors/aws/eks`. ([#9284](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9284)) > * `TextMapPropagator` in `go.opentelemetry.io/contrib/propagators/autoprop` returns the no-op propagator for empty input, matching the behavior of `none`. An unknown `OTEL_PROPAGATORS` value still returns an error with a nil propagator so `NewTextMapPropagator` falls back to the default TraceContext and Baggage propagators instead of disabling propagation. ([#9163](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9163)) > * Preserve error-valued attributes nested in a group as grouped attributes instead of silently dropping them in `go.opentelemetry.io/contrib/bridges/otelslog`. ([#9238](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9238)) > * Fix a data race in `go.opentelemetry.io/contrib/bridges/otelslog` where concurrent `Handle` calls could corrupt each other's log attributes because `kvBuffer.KeyValues` returned a slice aliasing a shared buffer. ([#9229](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9229)) > * Avoid a panic in `go.opentelemetry.io/contrib/bridges/otelzap` when a malformed error field contains a nil or non-error value. ([#9068](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9068)) > * Use `azure.container_app.instance.id` instead of `service.instance.id` for the replica name detected by `go.opentelemetry.io/contrib/detectors/azure/azurecontainerapps`. ([#9208](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9208)) > * Preserve the underlying metadata errors returned with partial resources from `go.opentelemetry.io/contrib/detectors/gcp`. ([#9069](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9069)) > * Copy `MultipartForm` back to the request `otelmux.Middleware` was given after the wrapped handler returns, so `net/http` can find and remove the temp files `ParseMultipartForm` created on the context-derived request copy, when `otelmux.Middleware` wraps a handler directly, in `go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux`. This does not cover a handler panic, nor the common `router.Use(...)` integration, where `gorilla/mux`'s own routing step makes an additional request copy the middleware cannot write back through; see [gorilla/mux#777](https://redirect.github.com/gorilla/mux/pull/777). ([#9361](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9361)) > * Report the `b3` header from `Fields()` for the default `B3Unspecified` single-header injection encoding, matching what `Inject` writes, in `go.opentelemetry.io/contrib/propagators/b3`. ([#9273](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9273)) > * Fix `go.opentelemetry.io/contrib/propagators/aws/xray` producing deterministic trace and span IDs when the seed read from `crypto/rand` silently failed, by switching to `math/rand/v2`'s concurrency-safe top-level generator. ([#9359](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9359)) > * Strip connection number suffix from connection ID in `go.opentelemetry.io/contrib/instrumentation/go.mongodb.org/mongo-driver/v2/mongo/otelmongo` to prevent unbounded metric cardinality. ([#9352](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9352)) ... (truncated) Commits * [`c8a87a6`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/c8a87a60ba1b3374fd16df11fc3eeae6c41abbc9) Release v1.45.0/v2.5.2/v0.70.0/v0.37.2/v0.25.0/v0.20.0/v0.16.2/v0.17.0 ([#9413](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9413)) * [`cde125c`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/cde125c563f232eb6b423a208d375f8e53ae2557) fix(deps): update aws-sdk-go-v2 monorepo ([#9384](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9384)) * [`88572a7`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/88572a7662d00e805777ed96932d532316c13787) chore(deps): update googleapis to 6ac0973 ([#9409](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9409)) * [`e4f511a`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/e4f511a0f3cc2b09b87cb164427b49dfd2e14f7d) chore(deps): update github/codeql-action action to v4.37.5 ([#9410](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9410)) * [`265eb0b`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/265eb0b5fe0682801fd8177aec74ce8769c5a0a4) fix(deps): update go.opentelemetry.io/otel digest to 48db2c6 ([#9317](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9317)) * [`941ba46`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/941ba46979c59dca89d26040ed919870283e36e9) chore(deps): update github.com/charmbracelet/ultraviolet digest to 8b69304 (#... * [`ededd3b`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/ededd3b571ad562351a0afe09682774a6f48d63e) chore(deps): update module github.com/lucasb-eyer/go-colorful to v1.4.1 ([#9406](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9406)) * [`7c6e819`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/7c6e819d4eb26eede10e98c424adb76304025fda) fix(deps): update module github.com/atombender/go-jsonschema to v0.24.1 ([#9405](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9405)) * [`ec1e544`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/ec1e544a0d6883126198c3fc3a7d62fc8db29195) chore(deps): update github.com/lufia/plan9stats digest to 341c2f0 ([#9403](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9403)) * [`5d7e16a`](https://github.com/open-telemetry/opentelemetry-go-contrib/commit/5d7e16aa1138a5446a648dd92ebc42031c93e327) chore(deps): update github.com/golangci/rowserrcheck digest to d2031e3 ([#9402](https://redirect.github.com/open-telemetry/opentelemetry-go-contrib/issues/9402)) * Additional commits viewable in [compare view](https://github.com/open-telemetry/opentelemetry-go-contrib/compare/zpages/v0.69.0...zpages/v0.70.0) Updates `go.opentelemetry.io/otel` from 1.44.0 to 1.45.0 Changelog *Sourced from [go.opentelemetry.io/otel's changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md).* > [1.45.0/0.67.0/0.21.0/0.0.18] - 2026-08-03 > ------------------------------------------ > > ### Added > > * Add experimental observability metrics to `BatchProcessor` in `go.opentelemetry.io/otel/sdk/log`. ([#7124](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/7124)) > * Add the experimental `WithUnsafeAttributes` no-copy attribute option to `go.opentelemetry.io/otel/metric/x` for future performance improvements. This API is a work in progress. ([#8251](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8251)) > * Add `Map` and `MapValue` functions for the new `MAP` attribute type in `go.opentelemetry.io/otel/attribute`. ([#8445](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8445)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/otlp/otlptrace`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/otlp/otlplog`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/otlp/otlpmetric`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/zipkin`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Apply `AttributeValueLengthLimit` recursively to values contained in `attribute.MAP` attributes in `go.opentelemetry.io/otel/sdk/trace`. ([#8454](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8454)) > * Remove duplicate keys from `attribute.MAP` values in `go.opentelemetry.io/otel/sdk/resource` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Remove duplicate keys by default from `attribute.MAP` values in instrumentation scope attributes in `go.opentelemetry.io/otel/sdk/log` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Remove duplicate keys by default from `attribute.MAP` values in span, event, link, and instrumentation scope attributes in `go.opentelemetry.io/otel/sdk/trace` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Remove duplicate keys by default from `attribute.MAP` values in measurement and instrumentation scope attributes in `go.opentelemetry.io/otel/sdk/metric` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Extend `WithAllowKeyDuplication` in `go.opentelemetry.io/otel/sdk/log` to disable duplicate-key removal in `attribute.MAP` values for instrumentation scope attributes. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Add the `go.opentelemetry.io/otel/semconv/v1.42.0` package. > The package contains semantic conventions from the `v1.42.0` version of the OpenTelemetry Semantic Conventions. > See the [migration documentation](https://github.com/open-telemetry/opentelemetry-go/blob/main/semconv/v1.42.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.41.0`. ([#8484](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8484)) > * Add `WithoutPanicRecording` as a `TracerProviderOption` in `go.opentelemetry.io/otel/sdk/trace` to disable exception event recording for panics. ([#8532](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8532)) > * Add the `go.opentelemetry.io/otel/semconv/v1.43.0` package. > The package contains semantic conventions from the `v1.43.0` version of the OpenTelemetry Semantic Conventions. > See the [migration documentation](https://github.com/open-telemetry/opentelemetry-go/blob/main/semconv/v1.43.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.42.0`. ([#8628](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8628)) > > ### Changed > > * `HistogramReservoir` in `go.opentelemetry.io/otel/sdk/metric/exemplar` now uses a time-unbiased sampling algorithm for exemplars. ([#8306](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8306)) > * ⚠️ **Breaking Change:** Use `go.opentelemetry.io/otel/attribute.Value` and `go.opentelemetry.io/otel/attribute.KeyValue` for log bodies and attributes in `go.opentelemetry.io/otel/log`, `go.opentelemetry.io/otel/log/logtest`, `go.opentelemetry.io/otel/sdk/log`, and `go.opentelemetry.io/otel/sdk/log/logtest`. ([#8490](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8490)) > * Encode log bodies and attributes as `go.opentelemetry.io/otel/attribute.Value` JSON in `go.opentelemetry.io/otel/exporters/stdout/stdoutlog`. ([#8490](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8490)) > * Improve the performance of hashing `BOOLSLICE`, `INT64SLICE`, `FLOAT64SLICE`, and `STRINGSLICE` attribute values by avoiding reflection for short slices in `go.opentelemetry.io/otel/attribute`. ([#8511](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8511)) > * ⚠️ **Breaking Change:** `WithEndpointURL` in `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp` no longer appends the default signal path when an endpoint URL has no path, making the behavior consistent with `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp` and with setting the endpoint through `OTEL_EXPORTER_OTLP_METRICS_ENDPOINT`. If the URL has no path component, the root path (`/`) is used. Use `WithEndpointURL(url.JoinPath(endpoint, "/v1/metrics"))` to preserve the previous behavior. ([#8538](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8538)) > * ⚠️ **Breaking Change:** `WithEndpointURL` in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp` no longer appends the default signal path when an endpoint URL has no path, making the behavior consistent with `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp` and with setting the endpoint through `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT`. If the URL has no path component, the root path (`/`) is used. Use `WithEndpointURL(url.JoinPath(endpoint, "/v1/traces"))` to preserve the previous behavior. ([#8538](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8538)) > > ### Deprecated > > * Deprecate `WithExportBufferSize` in `go.opentelemetry.io/otel/sdk/log`. The option remains available for source compatibility but no longer affects behavior; `BatchProcessor` no longer maintains a separate export-request buffer. ([#8620](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8620)) > > ### Removed > > * ⚠️ **Breaking Change:** Remove `Kind`, `Value`, `KeyValue`, their constructors, and attribute conversion helpers from `go.opentelemetry.io/otel/log`. ([#8490](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8490)) > * ⚠️ **Breaking Change:** Remove the `AttributeValueLengthLimit` and `AttributeCountLimit` fields from `RecordFactory` in `go.opentelemetry.io/otel/sdk/log/logtest`; records produced by the factory now keep attribute limits disabled so test code can append exact attributes. ([#8556](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8556)) > > ### Fixed > > * Apply TLS certificates configured through environment variables to gRPC connections in `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc`. > * Prevent panics in `go.opentelemetry.io/otel/bridge/opentracing` when OpenTracing baggage is propagated concurrently with `Span.SetBaggageItem`. > * Fix an off-by-one error in `FixedSizeReservoir` in `go.opentelemetry.io/otel/sdk/metric/exemplar` that prevented the first exemplar from being sampled after the reservoir was filled. ([#8309](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8309)) > * Interpret HTTP `Retry-After` header values as seconds instead of nanoseconds when retrying OTLP HTTP exports in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`, `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`, and `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp`. ([#8383](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8383)) > * Fix a memory leak in the `Reservoir` implementation in `go.opentelemetry.io/otel/sdk/metric/exemplar`, where storing the full `context.Context` pinned large objects such as gRPC transport buffers. ([#8389](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8389)) ... (truncated) Commits * [`93a693e`](https://github.com/open-telemetry/opentelemetry-go/commit/93a693edeed0e07ce5ebd1dfe67af42d1e2055d8) Release v1.45.0 ([#8693](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8693)) * [`c65d435`](https://github.com/open-telemetry/opentelemetry-go/commit/c65d435b43e5e6b82310e6b18dd4cdcb8ac63a0c) Merge commit from fork * [`223f9fd`](https://github.com/open-telemetry/opentelemetry-go/commit/223f9fdce4e4a85d6ee2155c6a140f236db72c8b) sdk/metric: remove obsolete randomFloat64 TODO ([#8685](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8685)) * [`06272bc`](https://github.com/open-telemetry/opentelemetry-go/commit/06272bc491566efb2c581c8a52e4986cfcccec5b) fix(deps): update googleapis to 6ac0973 ([#8694](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8694)) * [`a4f238f`](https://github.com/open-telemetry/opentelemetry-go/commit/a4f238f57646197d124edcf67baf4cd6ea6d0a9f) chore(deps): update github.com/charmbracelet/ultraviolet digest to 8b69304 (#... * [`37140e7`](https://github.com/open-telemetry/opentelemetry-go/commit/37140e78821d3cb29a33d4b601ca4645b80ceebd) chore(deps): update codspeedhq/action action to v5.0.2 ([#8690](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8690)) * [`cef0855`](https://github.com/open-telemetry/opentelemetry-go/commit/cef0855960bce4385c7d58c40e846573c190d826) chore(deps): update module github.com/lucasb-eyer/go-colorful to v1.4.1 ([#8689](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8689)) * [`e814a72`](https://github.com/open-telemetry/opentelemetry-go/commit/e814a7281f2d52a6440c3269e139145e62801a16) Merge commit from fork * [`bfd8eb7`](https://github.com/open-telemetry/opentelemetry-go/commit/bfd8eb7f85d3364fdde9ad1a408df98be30acadb) chore(deps): update github.com/golangci/rowserrcheck digest to d2031e3 ([#8687](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8687)) * [`48db2c6`](https://github.com/open-telemetry/opentelemetry-go/commit/48db2c659c3b138f971273cd91ea0bcb647768e1) chore(deps): update github/codeql-action action to v4.37.5 ([#8692](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8692)) * Additional commits viewable in [compare view](https://github.com/open-telemetry/opentelemetry-go/compare/v1.44.0...v1.45.0) Updates `go.opentelemetry.io/otel/metric` from 1.44.0 to 1.45.0 Changelog *Sourced from [go.opentelemetry.io/otel/metric's changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md).* > [1.45.0/0.67.0/0.21.0/0.0.18] - 2026-08-03 > ------------------------------------------ > > ### Added > > * Add experimental observability metrics to `BatchProcessor` in `go.opentelemetry.io/otel/sdk/log`. ([#7124](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/7124)) > * Add the experimental `WithUnsafeAttributes` no-copy attribute option to `go.opentelemetry.io/otel/metric/x` for future performance improvements. This API is a work in progress. ([#8251](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8251)) > * Add `Map` and `MapValue` functions for the new `MAP` attribute type in `go.opentelemetry.io/otel/attribute`. ([#8445](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8445)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/otlp/otlptrace`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/otlp/otlplog`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/otlp/otlpmetric`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Support `MAP` attributes in `go.opentelemetry.io/otel/exporters/zipkin`. ([#8453](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8453)) > * Apply `AttributeValueLengthLimit` recursively to values contained in `attribute.MAP` attributes in `go.opentelemetry.io/otel/sdk/trace`. ([#8454](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8454)) > * Remove duplicate keys from `attribute.MAP` values in `go.opentelemetry.io/otel/sdk/resource` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Remove duplicate keys by default from `attribute.MAP` values in instrumentation scope attributes in `go.opentelemetry.io/otel/sdk/log` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Remove duplicate keys by default from `attribute.MAP` values in span, event, link, and instrumentation scope attributes in `go.opentelemetry.io/otel/sdk/trace` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Remove duplicate keys by default from `attribute.MAP` values in measurement and instrumentation scope attributes in `go.opentelemetry.io/otel/sdk/metric` using last-value-wins semantics. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Extend `WithAllowKeyDuplication` in `go.opentelemetry.io/otel/sdk/log` to disable duplicate-key removal in `attribute.MAP` values for instrumentation scope attributes. ([#8471](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8471)) > * Add the `go.opentelemetry.io/otel/semconv/v1.42.0` package. > The package contains semantic conventions from the `v1.42.0` version of the OpenTelemetry Semantic Conventions. > See the [migration documentation](https://github.com/open-telemetry/opentelemetry-go/blob/main/semconv/v1.42.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.41.0`. ([#8484](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8484)) > * Add `WithoutPanicRecording` as a `TracerProviderOption` in `go.opentelemetry.io/otel/sdk/trace` to disable exception event recording for panics. ([#8532](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8532)) > * Add the `go.opentelemetry.io/otel/semconv/v1.43.0` package. > The package contains semantic conventions from the `v1.43.0` version of the OpenTelemetry Semantic Conventions. > See the [migration documentation](https://github.com/open-telemetry/opentelemetry-go/blob/main/semconv/v1.43.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.42.0`. ([#8628](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8628)) > > ### Changed > > * `HistogramReservoir` in `go.opentelemetry.io/otel/sdk/metric/exemplar` now uses a time-unbiased sampling algorithm for exemplars. ([#8306](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8306)) > * ⚠️ **Breaking Change:** Use `go.opentelemetry.io/otel/attribute.Value` and `go.opentelemetry.io/otel/attribute.KeyValue` for log bodies and attributes in `go.opentelemetry.io/otel/log`, `go.opentelemetry.io/otel/log/logtest`, `go.opentelemetry.io/otel/sdk/log`, and `go.opentelemetry.io/otel/sdk/log/logtest`. ([#8490](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8490)) > * Encode log bodies and attributes as `go.opentelemetry.io/otel/attribute.Value` JSON in `go.opentelemetry.io/otel/exporters/stdout/stdoutlog`. ([#8490](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8490)) > * Improve the performance of hashing `BOOLSLICE`, `INT64SLICE`, `FLOAT64SLICE`, and `STRINGSLICE` attribute values by avoiding reflection for short slices in `go.opentelemetry.io/otel/attribute`. ([#8511](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8511)) > * ⚠️ **Breaking Change:** `WithEndpointURL` in `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp` no longer appends the default signal path when an endpoint URL has no path, making the behavior consistent with `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp` and with setting the endpoint through `OTEL_EXPORTER_OTLP_METRICS_ENDPOINT`. If the URL has no path component, the root path (`/`) is used. Use `WithEndpointURL(url.JoinPath(endpoint, "/v1/metrics"))` to preserve the previous behavior. ([#8538](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8538)) > * ⚠️ **Breaking Change:** `WithEndpointURL` in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp` no longer appends the default signal path when an endpoint URL has no path, making the behavior consistent with `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp` and with setting the endpoint through `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT`. If the URL has no path component, the root path (`/`) is used. Use `WithEndpointURL(url.JoinPath(endpoint, "/v1/traces"))` to preserve the previous behavior. ([#8538](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8538)) > > ### Deprecated > > * Deprecate `WithExportBufferSize` in `go.opentelemetry.io/otel/sdk/log`. The option remains available for source compatibility but no longer affects behavior; `BatchProcessor` no longer maintains a separate export-request buffer. ([#8620](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8620)) > > ### Removed > > * ⚠️ **Breaking Change:** Remove `Kind`, `Value`, `KeyValue`, their constructors, and attribute conversion helpers from `go.opentelemetry.io/otel/log`. ([#8490](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8490)) > * ⚠️ **Breaking Change:** Remove the `AttributeValueLengthLimit` and `AttributeCountLimit` fields from `RecordFactory` in `go.opentelemetry.io/otel/sdk/log/logtest`; records produced by the factory now keep attribute limits disabled so test code can append exact attributes. ([#8556](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8556)) > > ### Fixed > > * Apply TLS certificates configured through environment variables to gRPC connections in `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc`. > * Prevent panics in `go.opentelemetry.io/otel/bridge/opentracing` when OpenTracing baggage is propagated concurrently with `Span.SetBaggageItem`. > * Fix an off-by-one error in `FixedSizeReservoir` in `go.opentelemetry.io/otel/sdk/metric/exemplar` that prevented the first exemplar from being sampled after the reservoir was filled. ([#8309](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8309)) > * Interpret HTTP `Retry-After` header values as seconds instead of nanoseconds when retrying OTLP HTTP exports in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`, `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`, and `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp`. ([#8383](https://redirect.github.com/open-telemetry/opentelemetry-go/issues/8383)) > * Fix a memory leak in the `Reservo... > _Description has been truncated_`

coderabbitai Bot mentioned this pull request Aug 1, 2026

zstd: keep BuildDict recent-offsets positive and loadable #1184

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klauspost approved these changes Aug 5, 2026

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fix(zstd): handle zero-literal BuildDict corpus

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cyphercodes force-pushed the cyphercodes/fix-zstd-builddict-zero-literals branch from 1210d32 to 9cce06e Compare August 5, 2026 13:45

klauspost merged commit 9874bc9 into klauspost:master Aug 5, 2026
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fix(zstd): handle zero-literal BuildDict corpus - #1178

fix(zstd): handle zero-literal BuildDict corpus#1178
klauspost merged 1 commit into
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cyphercodes:cyphercodes/fix-zstd-builddict-zero-literals

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cyphercodes commented Jul 25, 2026 •

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