message: debugger error handling
diff: @@ -234,10 +234,14 @@ export default class ExtCommand {
  return connection.attach().then(() => (
  connection.getDocument().then(docNode => (
  connection.querySelector(locator, docNode.nodeId).then(nodeId => (
  - connection.sendCommand("DOM.setFileInputFiles", { nodeId, files: [value] }).then(connection.detach)
  + connection.sendCommand("DOM.setFileInputFiles", { nodeId, files: value.split(",") }).then(connection.detach)
  ))
  ))
  - ));
  + )).catch(e => {
  + return connection.detach().then(() => {
  + throw e;
  + });
  + });
  } else {
  return this.sendMessage("type", locator, value);
  }
  