Crate features / tracing-core
Feature flags · tracing-core 0.1.36 · from crates.io 2026-10-24
tracing-core features: what each one does, and the line to copy
Short answertracing-core 0.1.36 has 1 feature. By default it turns on std, valuable?/std; add default-features = false to start from nothing. It needs Rust 1.65.0 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
std | yes | once_cell |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version tracing-core declares (rust-version), and the release that changed it:
- 0.1.22 (2022-02-04): Rust 1.42.0
- 0.1.23 (2022-03-09): Rust 1.49.0
- 0.1.31 (2023-05-11): Rust 1.56.0
- 0.1.33 (2024-11-25): Rust 1.63.0
- 0.1.34 (2025-06-06): Rust 1.65.0
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p tracing-core --precise <version>, or use resolver 3, which picks compatible versions for you.
More on tracing-core
Real downloads, dependents and alternatives: tracing-core crate data (2.6M real downloads a day, 386 dependents).
docs.rs feature list · crates.io · license MIT · edition 2018
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