[Python-checkins] Provide a little better debug output (GH-6940) (#6942)

[Barry Warsaw]

https://github.com/python/cpython/commit/56882db4f7e7ee14ed37d5234c8a06a5a50a7593
commit: 56882db4f7e7ee14ed37d5234c8a06a5a50a7593
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: Barry Warsaw <barry at python.org>
date: 2018-05-17T12:53:24-04:00
summary:

Provide a little better debug output (GH-6940) (#6942)

(cherry picked from commit 273f51f5ca9dd0420d327c95281b24078f8feeef)

Co-authored-by: Barry Warsaw <barry at python.org>

files:
M Lib/test/test_socket.py

diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 44501d922ad3..f377ebcb27b2 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -893,7 +893,7 @@ def test_host_resolution_bad_address(self):
         )
         for addr in ['0.1.1.~1', '1+.1.1.1', '::1q', '::1::2',
                      '1:1:1:1:1:1:1:1:1']:
-            with self.assertRaises(OSError):
+            with self.assertRaises(OSError, msg=addr):
                 socket.gethostbyname(addr)
             with self.assertRaises(OSError, msg=explanation):
                 socket.gethostbyaddr(addr)