Function rustc_hir_analysis::check::compare_method::compare_asyncness

fn compare_asyncness<'tcx>(
    tcx: TyCtxt<'tcx>,
    impl_m: &AssocItem,
    impl_m_span: Span,
    trait_m: &AssocItem,
    trait_item_span: Option<Span>
) -> Result<(), ErrorGuaranteed>