Static rustc_lint::builtin::UNSTABLE_FEATURES

static UNSTABLE_FEATURES: &Lint

The unstable_features lint detects uses of #![feature].

Example

#![deny(unstable_features)]
#![feature(test)]

{{produces}}

Explanation

In larger nightly-based projects which

• consist of a multitude of crates where a subset of crates has to compile on stable either unconditionally or depending on a cfg flag to for example allow stable users to depend on them,
• don’t use nightly for experimental features but for, e.g., unstable options only,

this lint may come in handy to enforce policies of these kinds.