No Thread in the Debugger

I have this code

method MainViewController.doStuff(sender: id);
begin
  dispatch_async(Queue, method begin 
      try
        raise new NotImplementedException withName('ProxyException') reason('') userInfo(nil);
      
      except
        on E:NotImplementedException do
        begin
          NSLog('Some exception');
        end
      end;
      
    end);
  
end;

in an iPhone app with the method attached to a button. When I hit the button the debugger stops

Exception on thread [no thread]
Type:
Message: An exception of type: occurred:

Should it say [no thread]

without the dispatch async it reports the thread id.

Is the lack of exception type a known issue ? I seem to remember this happening before.

Cheers,
John

Probably the same issue as in the other thread?

I wasn’t sure. What about the lack of info about the exception being raised ? This doesn’t appear if I’m on the UI thread or not.

Year, that seems to be a second, probably unrelated, bug. Also logged.