rust-lang / rust-lang/rust-clippy
Warn on missing `edition` field in Cargo.toml
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T-cargo
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- Rust
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Description
What it does
In 2026, it should be a mistake not to explicitly set language edition
Advantage
- avoid accidentally removing edition field from the Cargo.toml
- prevent ambiguity
Drawbacks
Will warn on ancient code
Example
[package]
# no edition field
Comparison with existing lints
See also #6431 which discussed it 6 years ago as part of a bigger "cargo.toml" lint set up
Additional Context
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the requested behavior and the related discussion in issue #6431; this issue names no implementation file, entry point, or test. Done means a missing edition field in Cargo.toml produces a warning while explicitly set editions do not, with coverage for the shown manifest shape.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 52/100