UnityWebRequest isDone crash

Hi guys,

I recently tried to adapt part of our web requests to use UnityWebRequests throughout our project and came across a weird issue.

Part of the code was yielding the result and worked just fine but I tried to use the isDone and downloadProgress properties to report progress and got a 100% editor crash when doing so.

Here is the old working code :

 using (UnityWebRequest request = new UnityWebRequest(Url, Method))
 {
     var it = headers.GetEnumerator();
     while (it.MoveNext())
     {
         var entry = it.Current;
         request.SetRequestHeader(entry.Key, entry.Value);
     }
     if (body != null)
     {
         UploadHandler upload = new UploadHandlerRaw(body);
         request.uploadHandler = upload;
     }
     DownloadHandler download = new DownloadHandlerBuffer();
     request.downloadHandler = download;
     yield return request.Send();
     response = new WebRequestResponse(request);
 }

Here's the code that creates a crash of the editor :

 using (UnityWebRequest request = new UnityWebRequest(Url, Method))
 {
     var it = headers.GetEnumerator();
     while (it.MoveNext())
     {
         var entry = it.Current;
         request.SetRequestHeader(entry.Key, entry.Value);
     }
     if (body != null)
     {
         UploadHandler upload = new UploadHandlerRaw(body);
         request.uploadHandler = upload;
     }
     DownloadHandler download = new DownloadHandlerBuffer();
     request.downloadHandler = download;
     request.Send();
     while (request.isDone == false)
     {
         Progress = request.downloadProgress;
         yield return null;
     }
     response = new WebRequestResponse(request);
 }

And most surprising of all to me is that we found a workaround doing this :

 using (UnityWebRequest request = new UnityWebRequest(Url, Method))
 {
     var it = headers.GetEnumerator();
     while (it.MoveNext())
     {
         var entry = it.Current;
         request.SetRequestHeader(entry.Key, entry.Value);
     }
     if (body != null)
     {
         UploadHandler upload = new UploadHandlerRaw(body);
         request.uploadHandler = upload;
     }
     DownloadHandler download = new DownloadHandlerBuffer();
     request.downloadHandler = download;
     AsyncOperation op = request.Send();
     while (op.isDone == false)
     {
         Progress = op.progress;
         yield return null;
     }
     response = new WebRequestResponse(request);
 }

(Not sure the isDone and progress properties are good in this case though) It does look like a bug in the editor to me, does any of you have more info on that or should I report a bug?

I'm working on a simple repro case right now.

Thanks!

Edit : As expected I couldn't create a "simple" repro case as it's probably a mix of specific requests at various frequencies during gameplay. Still, the fact that the editor itself crashes is a problem that souldn't happen even if we have some scripting mistakes/bad practices