Function rustc::middle::stability::check_unstable_api_usage

pub fn check_unstable_api_usage<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) -> FnvHashMap<InternedString, StabilityLevel>

Unstable (rustc_private)

Cross-references the feature names of unstable APIs with enabled features and possibly prints errors. Returns a list of all features used.