specifying a scope-name with unescaped quote in name gives LCB_ERR_KVENGINE_INVALID_PACKET

Update:  The problem was the erroneous back-quote in the scope name.
sampleBucket.scope("userData`");
Other types of errors in the name give the correct "scope not found". 

-----------------------------------------------------------------------

Using a collection name that is not default (or explicity _default)  with a back-quote embedded in it gives
Error: LCB_ERR_KVENGINE_INVALID_PACKET (1031): A badly formatted packet was sent to the server.The first is sampleColl, it works fine. The second is sampleColl2 - it gives the error.------------
Collection {
 _scope: Scope {
  _bucket: Bucket

{    _cluster: [Cluster],    _name: 'travel-users',    _conn: [Connection]   }

,
  _name: '_default',
  _conn: Connection {
   _inst: CbConnection {},
   _pendOps: [],
   _pendBOps: [],
   _connected: false,
   _opened: true
  }
 },
 _name: '_default',
 _conn: Connection {
  _inst: CbConnection {},
  _pendOps: [],
  _pendBOps: [],
  _connected: false,
  _opened: true
 }
}
------------
Collection {
 _scope: Scope {
  _bucket: Bucket

{    _cluster: [Cluster],    _name: 'travel-users',    _conn: [Connection]   }

,
  _name: 'userData`',
  _conn: Connection {
   _inst: CbConnection {},
   _pendOps: [],
   _pendBOps: [],
   _connected: false,
   _opened: true
  }
 },
 _name: 'users',
 _conn: Connection {
  _inst: CbConnection {},
  _pendOps: [],
  _pendBOps: [],
  _connected: false,
  _opened: true
 }
}
------------

[Error: LCB_ERR_KVENGINE_INVALID_PACKET (1031): A badly formatted packet was sent to the server. Please report this in a bug] {

  code: 1031,

  ctxtype: 'kv',

  status_code: 4,

  opaque: 0,

  cas: CbCas

{ '0': <Buffer 00 00 00 00 00 00 00 00> }

,

  key: 'user_77',

  bucket: 'travel-users',

  collection: '',

  scope: '',

  context: '',

  ref: ''

}

upsert failed with Error: LCB_ERR_KVENGINE_INVALID_PACKET (1031): A badly formatted packet was sent to the server. Please report this in a bug

const sampleCluster = new couchbase.Cluster("
http://localhost
", options);
const sampleBucket = sampleCluster.bucket("travel-users");var sampleScope = sampleBucket.scope("_default");
var sampleColl = sampleScope.collection("_default"); var sampleScope2 = sampleBucket.scope("userData`");
var sampleColl2 = sampleScope2.collection("users"); console.log("------------");
console.log(sampleColl);
console.log("------------");
console.log(sampleColl2);
console.log("------------");// #tag::opencollections[] var result;
var user=request.query.k ? request.query.k : 'user_77';
try

{ // ensure 'user_77' works. Others will return doc not found var collDocument; collDocument =

{ id:'77', type:'user', first : 'Davey', last:'Crockett'}

;
var smthing = await sampleColl2.upsert('user_77', collDocument,
// new Options()._cas(cas)._timeout(5000), // 5 seconds
(err, res) =>

{ if(err) console.log(err); if(res) console.log(res); }

).catch((e) =>

{ console.log("upsert failed with "+e) }

);