Thrown exceptions have incorrect error format

When an exception is thrown inside an ODataController the response does not adhere to the OData v4 Error Response.

Example:

public class FooController : ODataController
{
  [HttpGet]
  [EnableQuery]
  public IActionResult Get()
  {
    throw new Exception("test");
    // or
    throw new ODataException("test");
  }
}

yields (content-type: text/plain):

Microsoft.OData.ODataException: test
   at ...omitted

HEADERS
=======
...omitted

I was expecting a JSON response with a format that is in spec.

{
  "error": {
    "code": "500",
    "message": "Test",
    "target": "query",
    "details": [...],
    "innererror": {
      "trace": [...],
      "context": {...}
    }
  }
}

There is some old documentation that talks about CreateErrorResponse. However that no longer works. And frankly I'd expect the ODataController to handle thrown exceptions so they have the correct/expected format.

Am I missing some configuration? Or is exception handling expected to be manually handled?

EDIT:

Turns out the text/plain response was from app.UseDeveloperExceptionPage();.
app.UseExceptionHandler("/Error"); will just return a HTML page.
If none of them are set the response is an empty (content-length: 0) 500 HTTP error.

None of these responses are to spec :)

May I suggest an app.UseDeveloperODataExceptionPage(); that if the endpoint requested is a registered OData resource then it returns html, json or xml based on the client Accept header,
This aligns with the built-in UseDeveloperExceptionPage.

As for app.UseExceptionHandler("/Error"). We still don't share detailed exception information publicly when the app runs in production. Thinking app.UseODataExceptionHandler() that again will return content based on the client Accept header.

JSON:

{
  "error": {
    "code": "500",
    "message": "Internal Server Error"
  }
}