strange error when executing n1ql with bootstrap-failed bucket

var couchbase = require('couchbase');

var N1qlQuery = couchbase.N1qlQuery;

var bucket = (new couchbase.Cluster('couchbase://localhost')).openBucket('travel-saddmple',

function(err) {

    console.error('Got error %j', err);

});

var q = N1qlQuery.fromString('SELECT * FROM `travel-sample` LIMIT 10');

var req = bucket.query(q);

req.on('row', function(row) {

    console.log('Got a row');

});

req.on('error', function(err) {

    console.error('Got error %j', err);

});

req.on('end', function(meta) {

    console.log('All rows received. Metadata is %j:', meta);

});

/Users/mnunberg/Source/node-dev/node_modules/couchbase/lib/bucket.js:189

      itm[1][itm[1].length-1](err, null);

                             ^

TypeError: itm[1][(itm[1].length - 1)] is not a function

    at Bucket.<anonymous> (/Users/mnunberg/Source/node-dev/node_modules/couchbase/lib/bucket.js:189:30)

    at emitOne (events.js:82:20)

    at Bucket.emit (events.js:169:7)

    at Bucket.<anonymous> (/Users/mnunberg/Source/node-dev/node_modules/couchbase/lib/bucket.js:172:19)