diff -r 803b7569c9ea -r 5fe0b880200e mercurial/posix.py
--- a/mercurial/posix.py	Sat Sep 29 02:02:35 2018 -0400
+++ b/mercurial/posix.py	Tue Sep 25 21:16:12 2018 -0400
@@ -43,6 +43,7 @@
     def oslink(src, dst):
         raise OSError(errno.EINVAL,
                       'hardlinks not supported: %s to %s' % (src, dst))
+readlink = os.readlink
 unlink = os.unlink
 rename = os.rename
 removedirs = os.removedirs