{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
                let (old_base, old_info) = src.load_scalar_pair(fx);
            if fx.layout_of(src.layout().ty.builtin_deref(true).unwrap()).is_unsized() {
                unsize_ptr(fx, old_base, src.layout(), dst.layout(), Some(old_info))