diff -r ddbff1435e7b -r a7d1532b26a1 mercurial/sslutil.py
--- a/mercurial/sslutil.py	Fri Jul 01 15:12:33 2016 -0500
+++ b/mercurial/sslutil.py	Sat Jul 02 09:41:40 2016 -0700
@@ -236,7 +236,7 @@
                 if _dnsnamematch(value, hostname):
                     return
             except wildcarderror as e:
-                return e.message
+                return e.args[0]
 
             dnsnames.append(value)
 
@@ -257,7 +257,7 @@
                         if _dnsnamematch(value, hostname):
                             return
                     except wildcarderror as e:
-                        return e.message
+                        return e.args[0]
 
                     dnsnames.append(value)