diff -r 0031e972ded2 -r 3c15b84ab66c mercurial/urllibcompat.py
--- a/mercurial/urllibcompat.py	Thu Mar 08 15:08:20 2018 -0800
+++ b/mercurial/urllibcompat.py	Thu Mar 08 11:21:46 2018 -0800
@@ -48,6 +48,7 @@
         "urlunparse",
     ))
     urlreq._registeralias(urllib.parse, "parse_qs", "parseqs")
+    urlreq._registeralias(urllib.parse, "parse_qsl", "parseqsl")
     urlreq._registeralias(urllib.parse, "unquote_to_bytes", "unquote")
     import urllib.request
     urlreq._registeraliases(urllib.request, (
@@ -159,6 +160,7 @@
         "urlunparse",
     ))
     urlreq._registeralias(urlparse, "parse_qs", "parseqs")
+    urlreq._registeralias(urlparse, "parse_qsl", "parseqsl")
     urlerr._registeraliases(urllib2, (
         "HTTPError",
         "URLError",