{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"assert!(lval.layout().ty.is_sized(fx.tcx,"}]}
                    assert!(lval.layout().ty.is_sized(fx.tcx, fx.typing_env()));
                Rvalue::NullaryOp(ref null_op, ty) => {
                    let layout = fx.layout_of(fx.monomorphize(ty));