Export Handler errors come back with HTTP 200

~/solr-7.4.0$ curl -v "http://localhost:8983/solr/gettingstarted/export/?q=*:*"
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8983 (#0)
> GET /solr/gettingstarted/export/?q=*:* HTTP/1.1
> Host: localhost:8983
> User-Agent: curl/7.54.0
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Type: json
< Transfer-Encoding: chunked
< 
{
"responseHeader":{"status":400},
"response":{
"numFound":0,
* Connection #0 to host localhost left intact
"docs":[{"EXCEPTION":"org.apache.solr.search.SyntaxError: No sort criteria was provided."}]}}

~/solr-7.4.0$ curl -v http://localhost:8983/solr/gettingstarted/query/?q=a:a
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8983 (#0)
> GET /solr/gettingstarted/query/?q=a:a HTTP/1.1
> Host: localhost:8983
> User-Agent: curl/7.54.0
> Accept: */*
> 
< HTTP/1.1 400 Bad Request
< Cache-Control: no-cache, no-store
< Pragma: no-cache
< Expires: Sat, 01 Jan 2000 01:00:00 GMT
< Last-Modified: Mon, 09 Jul 2018 13:12:51 GMT
< ETag: "1647f2c5e7e"
< Content-Type: text/plain;charset=utf-8
< Content-Length: 317
< 
{
"responseHeader":{
"zkConnected":true,
"status":400,
"QTime":1,
"params":{
"q":"a:a"}},
"error":{
"metadata":[
"error-class","org.apache.solr.common.SolrException",
"root-error-class","org.apache.solr.common.SolrException"],
"msg":"undefined field a",
"code":400}}
* Connection #0 to host localhost left intact