Can we use index pattern if we allow only alias in roles

Elastic Stack Elasticsearch
3

@TimV you can follow the steps to reproduce

Create the ROLE

curl -XPUT -H 'Content-Type: application/json' -k -u user:password 
https://hostname:9200/_xpack/security/role/test 
-d'{
"cluster": [],
"indices": [
    {"names": ["testing"],
    "privileges": ["read","view_index_metadata"]
    }
 ]
}'

Create the user

curl -XPUT -H 'Content-Type: application/json' -k -u user:password 
https://hostname:9200/_xpack/security/user/user_name 
-d'{
    "password": "password",
    "roles" : ["kibana_user","test"],
}'

Create index with alias

curl -XPUT -H 'Content-Type: application/json' -k -u user:password 
https://hostname:9200/failed-000001 
-d'{
"aliases": {
    "testing":{
        "is_write_index": true 
        }
    }
}'

Posting the doc

curl -XPOST -H 'Content-Type: application/json' -k -u user:password 
https://hostname:9200/testing/_doc 
-d'{
   "name": "test"
}'

able to search the data with alias name

GET testing/_search

but unable to query the data with index or index pattern

GET failed-000001/_search
Error is 
"reason" : "action [indices:data/read/search] is unauthorized..."

with index pattern getting no doc

GET failed*/_search
{
 "took" : 0,
 "timed_out" : false,
 "_shards" : {
  "total" : 0,
  "successful" : 0,
  "skipped" : 0,
  "failed" : 0
 },
 "hits" : {
  "total" : {
  "value" : 0,
  "relation" : "eq"
},
"max_score" : 0.0,
"hits" : [ ]
}

}