⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 RHEL7 3.x has failed when building commit d8d55d1.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/15/builds/2958) and take a look at the build logs.
4. Check if the failure is related to this commit (d8d55d1) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/15/builds/2958

Failed tests:

• test_socket

Failed subtests:

• test_idna - test.test_socket.GeneralModuleTests.test_idna

Summary of the results of the build (if available):

== Tests result: FAILURE then FAILURE ==

414 tests OK.

10 slowest tests:

• test_concurrent_futures: 2 min 26 sec
• test_multiprocessing_spawn: 1 min 59 sec
• test_capi: 1 min 41 sec
• test_multiprocessing_forkserver: 1 min 18 sec
• test_urllib2net: 1 min 10 sec
• test_multiprocessing_fork: 1 min 8 sec
• test_asyncio: 1 min 7 sec
• test_socket: 1 min 3 sec
• test_signal: 56.2 sec
• test_tokenize: 52.3 sec

1 test failed:
test_socket

20 tests skipped:
test_devpoll test_gdb test_idle test_ioctl test_kqueue
test_launcher test_msilib test_smtpnet test_ssl test_startfile
test_tcl test_tix test_tkinter test_ttk test_ttk_textonly
test_turtle test_winconsoleio test_winreg test_winsound
test_zipfile64

1 re-run test:
test_socket

Total duration: 4 min 39 sec

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64/build/Lib/test/test_socket.py", line 1619, in test_idna
    socket.getaddrinfo(domain,0,socket.AF_UNSPEC,socket.SOCK_STREAM)
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64/build/Lib/socket.py", line 962, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
socket.gaierror: [Errno -2] Name or service not known


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64/build/Lib/test/test_socket.py", line 1618, in test_idna
    socket.gethostbyname_ex(domain)
socket.herror: [Errno 2] Host name lookup failure