From 15408a357f5b9d668452408124a0e996554c02c4 Mon Sep 17 00:00:00 2001
From: Randall Leeds <randall@bleeds.info>
Date: Tue, 14 Mar 2017 13:49:41 -0700
Subject: [PATCH] Catch errors setting SO_REUSEPORT

Fix #1480
---
 gunicorn/sock.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/gunicorn/sock.py b/gunicorn/sock.py
index 6f3044b2..562a6653 100644
--- a/gunicorn/sock.py
+++ b/gunicorn/sock.py
@@ -39,8 +39,12 @@ class BaseSocket(object):
 
     def set_options(self, sock, bound=False):
         sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        if hasattr(socket, 'SO_REUSEPORT'):
-            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+        if hasattr(socket, 'SO_REUSEPORT'):  # pragma: no cover
+            try:
+                sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+            except socket.error as err:
+                if err[0] not in (errno.ENOPROTOOPT, errno.EINVAL):
+                    raise
         if not bound:
             self.bind(sock)
         sock.setblocking(0)