{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
        // Make sure the layout is equal, too -- just to be safe. Miri really
    if util::relate_types(tcx, typing_env, Variance::Covariant, src.ty, dest.ty) {
        // needs layout equality. For performance reason we skip this check when