Unexpected status code when querying _search_analyze with empty analyzer field

[emlaver]

The query below resulted in a 500 status code with message {"error":"unknown_error","reason":"no_such_analyzer"}:

curl -u user:pass https://account.cloudant.com/_search_analyze -H "Content-Type: application/json" --data '{
  "analyzer": "",       
  "text": ""
}'

I would suggest updating the status code to 400 bad request.