diff -r 94c25f694ec3 -r 24e493ec2229 mercurial/unionrepo.py
--- a/mercurial/unionrepo.py	Mon Sep 24 22:46:22 2018 -0400
+++ b/mercurial/unionrepo.py	Fri Sep 21 19:48:23 2018 -0400
@@ -19,13 +19,13 @@
 from . import (
     changelog,
     cmdutil,
+    encoding,
     error,
     filelog,
     localrepo,
     manifest,
     mdiff,
     pathutil,
-    pycompat,
     revlog,
     util,
     vfs as vfsmod,
@@ -240,7 +240,7 @@
         return unionpeer(self)
 
     def getcwd(self):
-        return pycompat.getcwd() # always outside the repo
+        return encoding.getcwd() # always outside the repo
 
 def instance(ui, path, create, intents=None, createopts=None):
     if create:
@@ -248,13 +248,13 @@
     parentpath = ui.config("bundle", "mainreporoot")
     if not parentpath:
         # try to find the correct path to the working directory repo
-        parentpath = cmdutil.findrepo(pycompat.getcwd())
+        parentpath = cmdutil.findrepo(encoding.getcwd())
         if parentpath is None:
             parentpath = ''
     if parentpath:
         # Try to make the full path relative so we get a nice, short URL.
         # In particular, we don't want temp dir names in test outputs.
-        cwd = pycompat.getcwd()
+        cwd = encoding.getcwd()
         if parentpath == cwd:
             parentpath = ''
         else: