Bump slog from 2.7.0 to 2.8.2

[dependabot]

Bumps slog from 2.7.0 to 2.8.2.

Release notes

Sourced from slog's releases.

Fix private field breaking # operator in macros

Fixes issue #364

Release Notes

Fixed

• Fix use of # operator in macros due to private field (issue #364)
  • Thanks to @​Manishearth for identifying this.
• ci: Check the tests pass with -Zminimal-versions

Move back to erased_serde v0.3

The upgrade from erased_serde v0.3 to v0.4 in v2.8.0 was a breaking change, as it affected the public API. In the future, we may find a way to upgrade in a backwards-compatible manner. This should not affect normal users of the API but could break drains supporting nested-values.

I (@​Techcable) apologize for this breakage and have yanked the 2.8.0 release due to this issue. I will try to setup cargo-semver-checks in the CI to avoid this in the future.

Fixed

• Restore compatibility with erased-serde version 0.3.
  • Compatibility with erased-serde version 0.4 may be provided again in a future version, but will be done so in a backwards compatible way.
  • Thanks to @​demurgos for recognizing and fixing this in PR #359
• Ensure compatibility with -Zminimal-versions flag by specifying minimal dependency versions (fixes #357)

Enable nested-values feature by default

This is the biggest slog release since v2.0! It contains many smaller fixes and improvements to slog that have been accumulated across 5 years and 127 commits.

The nested-values feature was already present in slog, and allows logging serde::Serialize types in addition to primitives. Previously, the nested-values feature had to be enabled not just in slog but also in each drain crate (slog_json, slog_term, slog_async, etc). Enabling this feature by default makes the crate easier to use and avoids several papercts. It should have no runtime overhead if not used and low compile-time overhead thanks to the new serde_core crate.

Another major feature is Logger::flush, which explicitly flushes buffered log messages. The next major release of slog_json, slog_async, etc., will also include support for this feature, in addition to enabling nested-values by default.

Changelog

The following has been copied from CHANGELOG.md

Highlights

• Enables the nested-values feature by default. The next major release of slog_json, slog_term, etc should also enable this feature by default.
• Added Logger::flush and Drain::flush methods.
• Improved support for logging errors
  • Have # log specifier transparently support & references to error
  • Implement slog::Value for Box<dyn std::error::Error> and anyhow::Error
• Define a prelude module for common imports
• Upgraded to Rust 2018 and require Rust 1.61
  • Deprecate the old slog_log! macros in favor of slog::log!
• Many internal improvements & bug fixes

Changed

• Enables the nested-values feature by default.
• Updated to Rust 2018
  • NOTE: Old 2015 crates will still work because of excellent 2015/2018 compatibility

... (truncated)

Changelog

Sourced from slog's changelog.

2.8.2 - 2025-10-11

Fixed

• Fix use of # operator in macros due to private field (issue #364)
  • Thanks to @​Manishearth for identifying this.
• ci: Check the tests pass with -Zminimal-versions

2.8.1 - 2025-10-05

This fixes an accidental breaking change in the v2.8.0 release, where the public API was changed from erased_serde v0.4 to erased_serde v0.3. This should not affect normal users of the API but could break drains supporting nested-values.

I (@​Techcable) apologize for this breakage and have yanked the 2.8.0 release due to this issue. I will try to setup cargo-semver-checks in the CI to avoid this in the future.

Fixed

• Restore compatibility with erased-serde version 0.3.
  • Compatibility with erased-serde version 0.4 may be provided again in a future version, but will be done so in a backwards compatible way.
  • Thanks to @​demurgos for recognizing and fixing this in PR #359
• Ensure compatibility with -Zminimal-versions flag by specifying minimal dependency versions (fixes #357)

[2.8.0] - 2025-10-05

This is the biggest slog release since 2.0. It fully preserves compatibility with prior releases.

Highlights

• Enables the nested-values feature by default. The next major release of slog_json, slog_term, etc should also enable this feature by default.
• Added Logger::flush and Drain::flush methods.
• Improved support for logging errors
  • Have # log specifier transparently support & references to error
  • Implement slog::Value for Box<dyn std::error::Error> and anyhow::Error
• Define a prelude module for common imports
• Upgraded to Rust 2018 and require Rust 1.61
  • Deprecate the old slog_log! macros in favor of slog::log!
• Many internal improvements & bug fixes

Changed

• Enables the nested-values feature by default.
• Updated to Rust 2018
  • NOTE: Old 2015 crates will still work because of excellent 2015/2018 compatibility
• Bump MSRV to 1.61
  • This is already required for erased-serde, syn, serde_core, and many other important crates in the rust ecosystem.
• Update erased-serde from v0.3 to v0.4
• Depend on [serde_core] rather than serde to reduce compile times.

Added

• Added a Logger::flush and Drain::flush methods
  • Since this is a new method, not all drains implement it.

... (truncated)

Commits

• e694b83 Bump version to 2.8.2
• 693fc37 Fix issue #364 - Broken # operator in macros
• 66f082b ci: Add test job for -Zminimal-versions
• a26eb6e Bump version to v2.8.1
• 2107d2e Fix compilation issues with -Zminimum-versions
• 9814a8b regression fix: restore compatibility with erased-serde version 0.3
• ec46dcc Bump version to v2.8.0
• a447574 Use serde_core instead of serde
• 60add84 ci: Run rustdoc in CI, forbidding warnings
• 640c150 Fix outstanding rustdoc warnings
• Additional commits viewable in compare view

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