horse should always call os._exit(0)

.gitignore

@@ -15,3 +15,5 @@ Vagrantfile
 .idea/
 .coverage*
 /.cache
+
+.pytest_cache/

rq/worker.py

@@ -463,7 +463,6 @@ class Worker(object):
         """
         setup_loghandlers(logging_level, date_format, log_format)
         self._install_signal_handlers()
-
         did_perform_work = False
         self.register_birth()
         self.log.info("RQ worker {0!r} started, version {1}".format(self.key, VERSION))
@@ -671,13 +670,12 @@ class Worker(object):
         # that are different from the worker.
         random.seed()
 
+        try:
             self.setup_work_horse_signals()
-
             self._is_horse = True
             self.log = logger
-
-        success = self.perform_job(job, queue)
-
+            self.perform_job(job, queue)
+        finally:
             # os._exit() is the way to exit from childs after a fork(), in
             # constrast to the regular sys.exit()
             os._exit(0)