Horse should exit with return code 1 if it raises an exception

rq/worker.py

@@ -675,7 +675,10 @@ class Worker(object):
             self._is_horse = True
             self.log = logger
             self.perform_job(job, queue)
-        finally:
+        except:  # noqa
+            # Horse does not terminate properly
+            os._exit(1)
+
         # os._exit() is the way to exit from childs after a fork(), in
         # constrast to the regular sys.exit()
         os._exit(0)