diff -r bfb4494f846d -r 698fe0f6eb5c mercurial/url.py
--- a/mercurial/url.py	Mon Feb 26 13:34:35 2018 -0800
+++ b/mercurial/url.py	Tue Feb 27 00:43:37 2018 +0530
@@ -528,4 +528,4 @@
         path = util.normpath(os.path.abspath(url_))
         url_ = 'file://' + urlreq.pathname2url(path)
         authinfo = None
-    return opener(ui, authinfo).open(url_, data)
+    return opener(ui, authinfo).open(pycompat.strurl(url_), data)