From dd7c8f330b9c59c3b3de9752f74e290eed9a3440 Mon Sep 17 00:00:00 2001
From: Berker Peksag <berker.peksag@gmail.com>
Date: Wed, 12 Jul 2017 17:48:23 +0300
Subject: [PATCH] list.pop() doesn't accept a second argument

This was introduced by 032271a030a6bbe39d22e9ebadf2a86ddf3b6705.
---
 gunicorn/arbiter.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gunicorn/arbiter.py b/gunicorn/arbiter.py
index 6217406f..e1c9551e 100644
--- a/gunicorn/arbiter.py
+++ b/gunicorn/arbiter.py
@@ -205,7 +205,7 @@ class Arbiter(object):
             while True:
                 self.maybe_promote_master()
 
-                sig = self.SIG_QUEUE.pop(0, None)
+                sig = self.SIG_QUEUE.pop(0) if self.SIG_QUEUE else None
                 if sig is None:
                     self.sleep()
                     self.murder_workers()