Closes #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'
diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index c9829e1..9570a36 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -266,8 +266,8 @@
root = b'/'
else:
root = '/'
- userhome = userhome.rstrip(root) or userhome
- return userhome + path[i:]
+ userhome = userhome.rstrip(root)
+ return (userhome + path[i:]) or root
# Expand paths containing shell variable substitutions.
diff --git a/Lib/test/test_posixpath.py b/Lib/test/test_posixpath.py
index bb4559c..a7a3e4a 100644
--- a/Lib/test/test_posixpath.py
+++ b/Lib/test/test_posixpath.py
@@ -298,6 +298,7 @@
with support.EnvironmentVarGuard() as env:
env['HOME'] = '/'
self.assertEqual(posixpath.expanduser("~"), "/")
+ self.assertEqual(posixpath.expanduser("~/foo"), "/foo")
# expanduser should fall back to using the password database
del env['HOME']
home = pwd.getpwuid(os.getuid()).pw_dir