{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"DiagCtxt::new(Box::new(je)).handle().span_err(span,"}]}
        DiagCtxt::new(Box::new(je)).handle().span_err(span, "foo");
        let span = Span::with_root_ctxt(BytePos(span.0), BytePos(span.1));