Switch tracing, tracing-subscriber to unconditional no_std #3374
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Fixed an unused import warning under no-default-features.
… and remove stdlib module.
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djc
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# 0.1.42 (November 30, 2025) ### Added - **attributes**: Support constant expressions as instrument field names ([#3158]) - **core**: Improve code generation at trace points significantly ([#3398]) ### Fixed - Fix perf regression when `release_max_level_*` not set ([#3373]) - Use imported instead of fully qualified path ([#3374]) - Make `valueset` macro sanitary ([#3382]) ### Documented - **core**: Add missing `dyn` keyword in `Visit` documentation code sample ([#3387]) [#3158]: https://github.com/tokio-rs/tracing/pull/#3158 [#3373]: https://github.com/tokio-rs/tracing/pull/#3373 [#3374]: https://github.com/tokio-rs/tracing/pull/#3374 [#3382]: https://github.com/tokio-rs/tracing/pull/#3382 [#3387]: https://github.com/tokio-rs/tracing/pull/#3387 [#3398]: https://github.com/tokio-rs/tracing/pull/#3398
hds
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Nov 26, 2025
# 0.1.42 (November 26, 2025) ### Added - **attributes**: Support constant expressions as instrument field names ([#3158]) - **core**: Improve code generation at trace points significantly ([#3398]) ### Changed - `tracing-core`: updated to 0.1.35 ([#3414]) - `tracing-attributes`: updated to 0.1.31 ([#3417]) ### Fixed - Fix perf regression when `release_max_level_*` not set ([#3373]) - Use imported instead of fully qualified path ([#3374]) - Make `valueset` macro sanitary ([#3382]) ### Documented - **core**: Add missing `dyn` keyword in `Visit` documentation code sample ([#3387]) [#3158]: https://github.com/tokio-rs/tracing/pull/#3158 [#3373]: https://github.com/tokio-rs/tracing/pull/#3373 [#3374]: https://github.com/tokio-rs/tracing/pull/#3374 [#3382]: https://github.com/tokio-rs/tracing/pull/#3382 [#3387]: https://github.com/tokio-rs/tracing/pull/#3387 [#3398]: https://github.com/tokio-rs/tracing/pull/#3398 [#3414]: https://github.com/tokio-rs/tracing/pull/#3414 [#3417]: https://github.com/tokio-rs/tracing/pull/#3417
hds
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# 0.1.42 (November 26, 2025) ### Added - **attributes**: Support constant expressions as instrument field names ([#3158]) - Add `record_all!` macro for recording multiple values in one call ([#3227]) - **core**: Improve code generation at trace points significantly ([#3398]) ### Changed - `tracing-core`: updated to 0.1.35 ([#3414]) - `tracing-attributes`: updated to 0.1.31 ([#3417]) ### Fixed - Fix "name / parent" variant of `event!` ([#2983]) - Remove 'r#' prefix from raw identifiers in field names ([#3130]) - Fix perf regression when `release_max_level_*` not set ([#3373]) - Use imported instead of fully qualified path ([#3374]) - Make `valueset` macro sanitary ([#3382]) ### Documented - **core**: Add missing `dyn` keyword in `Visit` documentation code sample ([#3387]) [#2983]: https://github.com/tokio-rs/tracing/pull/#2983 [#3130]: https://github.com/tokio-rs/tracing/pull/#3130 [#3158]: https://github.com/tokio-rs/tracing/pull/#3158 [#3227]: https://github.com/tokio-rs/tracing/pull/#3227 [#3373]: https://github.com/tokio-rs/tracing/pull/#3373 [#3374]: https://github.com/tokio-rs/tracing/pull/#3374 [#3382]: https://github.com/tokio-rs/tracing/pull/#3382 [#3387]: https://github.com/tokio-rs/tracing/pull/#3387 [#3398]: https://github.com/tokio-rs/tracing/pull/#3398 [#3414]: https://github.com/tokio-rs/tracing/pull/#3414 [#3417]: https://github.com/tokio-rs/tracing/pull/#3417
hds
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Nov 26, 2025
# 0.1.42 (November 26, 2025) ### Important The [`Span::record_all`] method has been removed from the documented API. It was always unsuable via the documented API as it requried a `ValueSet` which has no publically documented constructors. The method remains, but should not be used outside of `tracing` macros. ### Added - **attributes**: Support constant expressions as instrument field names ([#3158]) - Add `record_all!` macro for recording multiple values in one call ([#3227]) - **core**: Improve code generation at trace points significantly ([#3398]) ### Changed - `tracing-core`: updated to 0.1.35 ([#3414]) - `tracing-attributes`: updated to 0.1.31 ([#3417]) ### Fixed - Fix "name / parent" variant of `event!` ([#2983]) - Remove 'r#' prefix from raw identifiers in field names ([#3130]) - Fix perf regression when `release_max_level_*` not set ([#3373]) - Use imported instead of fully qualified path ([#3374]) - Make `valueset` macro sanitary ([#3382]) ### Documented - **core**: Add missing `dyn` keyword in `Visit` documentation code sample ([#3387]) [#2983]: https://github.com/tokio-rs/tracing/pull/#2983 [#3130]: https://github.com/tokio-rs/tracing/pull/#3130 [#3158]: https://github.com/tokio-rs/tracing/pull/#3158 [#3227]: https://github.com/tokio-rs/tracing/pull/#3227 [#3373]: https://github.com/tokio-rs/tracing/pull/#3373 [#3374]: https://github.com/tokio-rs/tracing/pull/#3374 [#3382]: https://github.com/tokio-rs/tracing/pull/#3382 [#3387]: https://github.com/tokio-rs/tracing/pull/#3387 [#3398]: https://github.com/tokio-rs/tracing/pull/#3398 [#3414]: https://github.com/tokio-rs/tracing/pull/#3414 [#3417]: https://github.com/tokio-rs/tracing/pull/#3417 [`Span::record_all`]: https://docs.rs/tracing/0.1.41/tracing/struct.Span.html#method.record_all
hds
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Nov 26, 2025
# 0.1.42 (November 26, 2025) ### Important The [`Span::record_all`] method has been removed from the documented API. It was always unsuable via the documented API as it requried a `ValueSet` which has no publically documented constructors. The method remains, but should not be used outside of `tracing` macros. ### Added - **attributes**: Support constant expressions as instrument field names ([#3158]) - Add `record_all!` macro for recording multiple values in one call ([#3227]) - **core**: Improve code generation at trace points significantly ([#3398]) ### Changed - `tracing-core`: updated to 0.1.35 ([#3414]) - `tracing-attributes`: updated to 0.1.31 ([#3417]) ### Fixed - Fix "name / parent" variant of `event!` ([#2983]) - Remove 'r#' prefix from raw identifiers in field names ([#3130]) - Fix perf regression when `release_max_level_*` not set ([#3373]) - Use imported instead of fully qualified path ([#3374]) - Make `valueset` macro sanitary ([#3382]) ### Documented - **core**: Add missing `dyn` keyword in `Visit` documentation code sample ([#3387]) [#2983]: https://github.com/tokio-rs/tracing/pull/#2983 [#3130]: https://github.com/tokio-rs/tracing/pull/#3130 [#3158]: https://github.com/tokio-rs/tracing/pull/#3158 [#3227]: https://github.com/tokio-rs/tracing/pull/#3227 [#3373]: https://github.com/tokio-rs/tracing/pull/#3373 [#3374]: https://github.com/tokio-rs/tracing/pull/#3374 [#3382]: https://github.com/tokio-rs/tracing/pull/#3382 [#3387]: https://github.com/tokio-rs/tracing/pull/#3387 [#3398]: https://github.com/tokio-rs/tracing/pull/#3398 [#3414]: https://github.com/tokio-rs/tracing/pull/#3414 [#3417]: https://github.com/tokio-rs/tracing/pull/#3417 [`Span::record_all`]: https://docs.rs/tracing/0.1.41/tracing/struct.Span.html#method.record_all
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Follow-up to #3323. cc @djc