DUPLICATE_FEATURES in rustc_lint::builtin - Rust
Description: The `duplicate_features` lint detects duplicate features found in crate-level `feature` attributes.

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## DUPLICATE_FEATURES

# Static DUPLICATE_FEATURES

Source

    pub static DUPLICATE_FEATURES: &'static Lint

Expand description

The `duplicate_features` lint detects duplicate features found in crate-level `feature` attributes.

Note: This lint used to be a hard error (E0636).

#### §Example

ⓘ

    #![feature(rustc_attrs)]
    #![feature(rustc_attrs)]

{{produces}}

#### §Explanation

Enabling a feature more than once is a no-op. To avoid this warning, remove the second `feature()` attribute.