Crates / proc-macro2 / Maintained?
Rust crate maintenance · data Oct 24, 2026
Is proc-macro2 still maintained?
Short answerYes: actively maintained. proc-macro2's newest version, 1.0.107, shipped on Jul 19, 2026 (3 months ago). It has had 4 releases in the last 12 months and 18 in 24, and 161 non-yanked versions since 2017. 16,351 crates depend on it and it gets 4,890,919 real downloads a day.
The signals
- Last release: 3 months ago (1.0.107, Jul 19, 2026).
- Release rhythm: 4 in the last year, 18 in two.
- Still used: 4,890,919 real downloads a day, quiet-day trend -8% against the field.
- Yanked versions: 2 (a normal sign of a maintainer fixing a bad release).
Releases per quarter, last 2 years
| Quarter | Releases | |
|---|---|---|
| Oct 27 to Jan 25, 2025 | 4 | |
| Jan 26 to Apr 26, 2025 | 2 | |
| Apr 27 to Jul 26, 2025 | 0 | |
| Jul 27 to Oct 25, 2025 | 8 | |
| Oct 26 to Jan 24, 2026 | 3 | |
| Jan 25 to Apr 25, 2026 | 0 | |
| Apr 26 to Jul 25, 2026 | 1 | |
| Jul 26 to Oct 24, 2026 | 0 |
If you need something more active
Rules
From crates.io release history (non-yanked versions), fetched Oct 24, 2026: last release within 6 months = actively maintained; within 18 months = slow cadence; older with 1,000+ dependents = quiet and widely relied on; otherwise quiet. We do not read commits or issues: a crate can be finished and safe without new releases, and active on GitHub without publishing. Before you rely on it, look at the repository for recent commits and open issues. Run cargo audit for security advisories.
Up next
The full numbers: Foundational and steady. Chart, alternatives and badge.proc-macro2Rust crate. A substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case. Real use: 4.9M downloads...Read it next →Also worth your time