From c6443af29a9c8ef0ca47232015159c28cb05fb97 Mon Sep 17 00:00:00 2001
From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Wed, 27 Dec 2017 15:48:42 +0100
Subject: [PATCH] stringprep: Make pure-Python punycode() return bytes.

Fixes #3366.
---
 slixmpp/stringprep.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/slixmpp/stringprep.py b/slixmpp/stringprep.py
index 99506d78..672c63b7 100644
--- a/slixmpp/stringprep.py
+++ b/slixmpp/stringprep.py
@@ -114,7 +114,7 @@ def punycode(domain):
             if char in ILLEGAL_CHARS:
                 raise StringprepError
 
-        domain_parts.append(label)
+        domain_parts.append(label.encode('ascii'))
     return b'.'.join(domain_parts)
 
 logging.getLogger(__name__).warning('Using slower stringprep, consider '