nickva opened a new pull request, #4709:
URL: https://github.com/apache/couchdb/pull/4709
Add handling for invalid field errors. Previously they would emit a 500
`badmatch` error with a stack trace:
```
% curl -v -XPOST -H'Content-type:application/json' $URL/db/_find -d
'{"selector":{"_id":{"":null}}}'
< HTTP/1.1 500 Internal Server Error
{"error":"badmatch","reason":"{error,{{mango_error,mango_util,{invalid_field_name...
```
With the fix it emits a 400 error:
```
< HTTP/1.1 400 Bad Request
{"error":"invalid_field_name","reason":"Invalid field name: _id."}
```
This should also handle a general class of mango errors from `$db/_find`
which are sent from the workers, passed through the fabric/rexi mechanism, and
handled on the coordinator side. Previously some of those would emit the same
500 badmatch + a stack trace since we didn't expect errors in a few places
which generated a `badmatch`.
ted branches
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