diff -r 465858451347 -r a3d42d1865f1 mercurial/urllibcompat.py
--- a/mercurial/urllibcompat.py	Wed Feb 07 17:18:27 2018 -0800
+++ b/mercurial/urllibcompat.py	Tue Feb 06 18:13:15 2018 -0800
@@ -47,6 +47,7 @@
         "urlparse",
         "urlunparse",
     ))
+    urlreq._registeralias(urllib.parse, "parse_qs", "parseqs")
     urlreq._registeralias(urllib.parse, "unquote_to_bytes", "unquote")
     import urllib.request
     urlreq._registeraliases(urllib.request, (
@@ -157,6 +158,7 @@
         "urlparse",
         "urlunparse",
     ))
+    urlreq._registeralias(urlparse, "parse_qs", "parseqs")
     urlerr._registeraliases(urllib2, (
         "HTTPError",
         "URLError",