Reproduce issue https://github.com/elastic/elasticsearch/issues/32652 without nested fields

reproduce_termvector_bug.sh

#!/bin/bash -ex

PORT=9222
HEADER='Content-type: application/json'
VERSION=6.4.0

[ `sysctl -n vm.max_map_count` -ge 262144 ]  || sudo sysctl -w vm.max_map_count=262144

function finish {
  docker rm -f test-es
}
trap finish EXIT


docker run -d -p ${PORT}:9200 --name test-es docker.elastic.co/elasticsearch/elasticsearch:${VERSION}
docker logs -f test-es | (grep -m1 "started" && pkill -P $$$$ docker) || true # wait for es to start

curl -X PUT -H "${HEADER}" "localhost:${PORT}/test?pretty" -d '
{
  "settings": {
    "number_of_shards": 1,
    "analysis": {
      "filter": { "stopwords": { "type": "stop", "stopwords": "_english_" }},
      "analyzer": { "test": { "type": "custom", "tokenizer": "standard", "filter": [ "stopwords"] } }
    }
  }
}
'

curl -X PUT -H "${HEADER}" "localhost:${PORT}/test/_mapping/doc?pretty" -d '
{
  "doc": {
    "properties": {
      "nested": {
        "type": "nested",
        "properties": {
          "text_fail": {
            "type":"text", "analyzer":"test"
          },
          "text_success": {
            "type":"text", "analyzer":"standard"
          }
        }
      }
    }
  }
}
'

curl -X PUT -H "${HEADER}" "localhost:${PORT}/test/doc/1/?pretty" -d '
{
  "nested": {
    "text_fail": "the a is an",
    "text_success": "the a is an"
  }
}
'

curl -X GET "localhost:${PORT}/test/doc/1/_termvectors?fields=nested.text_fail,nested.text_success&pretty"