From 1db805c7f6b3509d127eaf081863b54842b84389 Mon Sep 17 00:00:00 2001
From: Benoit Chesneau <bchesneau@gmail.com>
Date: Thu, 5 Jan 2017 22:34:34 +0100
Subject: [PATCH] no fds are given by default in gunicorn

fix #1423
---
 gunicorn/arbiter.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gunicorn/arbiter.py b/gunicorn/arbiter.py
index 7296d2d7..1123bdb5 100644
--- a/gunicorn/arbiter.py
+++ b/gunicorn/arbiter.py
@@ -142,8 +142,7 @@ class Arbiter(object):
         self.init_signals()
 
         if not self.LISTENERS:
-            fds = []
-
+            fds = None
             listen_fds = systemd.listen_fds()
             if listen_fds:
                 self.systemd = True
@@ -151,6 +150,7 @@ class Arbiter(object):
                             systemd.SD_LISTEN_FDS_START + listen_fds)
 
             elif self.master_pid:
+                fds = []
                 for fd in os.environ.pop('GUNICORN_FD').split(','):
                     fds.append(int(fd))