--- async_sock.c.orig	2013-07-17 19:22:43.493922674 -0700
+++ async_sock.c	2013-07-17 19:29:06.393912269 -0700
@@ -306,7 +306,10 @@
  post_errno:
 	tevent_req_error(result, state->sys_errno);
  done:
-	fcntl(fd, F_SETFL, state->old_sockflags);
+	if (fcntl(fd, F_SETFL, state->old_sockflags) == -1) {
+		state->sys_errno = errno;
+		tevent_req_error(result, state->sys_errno);
+	}
 	return tevent_req_post(result, ev);
 }
 
@@ -352,7 +355,9 @@
 		tevent_req_data(req, struct async_connect_state);
 	int err;
 
-	fcntl(state->fd, F_SETFL, state->old_sockflags);
+	if (fcntl(state->fd, F_SETFL, state->old_sockflags) == -1) {
+		return -1;
+	}
 
 	if (tevent_req_is_unix_error(req, &err)) {
 		*perrno = err;