Invalid keys in multiget query cause application crash

While doing query to couchbase via cbclient.get(keys,function (err, doc, meta)

) where keys are invalid (in fact keys were array of array when I've spotted this bug: something like [[1,2,3],[1,5,6]...] ) it cause app crash (no error thrown in callback, callback never called). Application crashes with "Process finished with exit code -1073741819"

Sample code:
var keys = [[1,2,3],[4,6,3]];
couchbase.get(keys, function (err, doc, meta) {
if (err === null)

else

}

Also docs with that keys are not exist in base.