rust-lang / rust-lang/rust-clippy
Support `build.warnings`
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@raushan728 is already working on this.
Since May 26, 2026.
A-ui
C-enhancement
T-cargo
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- Rust
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Description
Cargo has stabilized the build.warnings configuration option. When used as build.warnings = "deny", this causes build, check, etc. to exit with an error status if any warnings are emitted, without changing those warnings to errors individually, and without changing the value of RUSTFLAGS.
For consistency with cargo check, cargo clippy should support the same behavior. That is,
cargo --config='build.warnings="deny"' clippy
should exit with a nonzero exit code if there are any warnings. Currently (clippy 0.1.97 (ad3a598ca4 2026-05-03)), it exits successfully.
@rustbot label +A-ui +C-enhancement +T-cargo
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