diff --git a/gunicorn/workers/async.py b/gunicorn/workers/async.py
index 486acec3..108f0e51 100644
--- a/gunicorn/workers/async.py
+++ b/gunicorn/workers/async.py
@@ -71,12 +71,6 @@ class AsyncWorker(base.Worker):
                   respiter.close()
             if resp.should_close():
                 raise StopIteration()
-        except StopIteration:
-            raise
-        except Exception, e:
-            #Only send back traceback in HTTP in debug mode.
-            self.handle_error(sock, e)
-            return False
         finally:
             try:
                 self.cfg.post_request(self, req)