rustc_trait_selection::traits::specialize

Function report_overlap_conflict

Source 
fn report_overlap_conflict<'tcx>(
    tcx: TyCtxt<'tcx>,
    overlap: OverlapError<'tcx>,
    impl_def_id: LocalDefId,
    used_to_be_allowed: Option<FutureCompatOverlapErrorKind>,
) -> Result<(), ErrorGuaranteed>