From f2011e3e49a91e613bbe69a198c2b2239cb874a6 Mon Sep 17 00:00:00 2001
From: Jesus Cea <jcea@jcea.es>
Date: Thu, 10 May 2012 05:01:11 +0200
Subject: [PATCH] Closes #14768: os.path.expanduser('~/a') doesn't works
 correctly when HOME is '/'

---
 Lib/posixpath.py           | 4 ++--
 Lib/test/test_posixpath.py | 1 +
 Misc/ACKS                  | 1 +
 Misc/NEWS                  | 2 ++
 4 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index aae38d5abf3..163c00c445c 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -267,8 +267,8 @@ def expanduser(path):
         except KeyError:
             return path
         userhome = pwent.pw_dir
-    userhome = userhome.rstrip('/') or userhome
-    return userhome + path[i:]
+    userhome = userhome.rstrip('/')
+    return (userhome + path[i:]) or '/'
 
 
 # Expand paths containing shell variable substitutions.
diff --git a/Lib/test/test_posixpath.py b/Lib/test/test_posixpath.py
index 8bb78d66e2f..957a903e3f7 100644
--- a/Lib/test/test_posixpath.py
+++ b/Lib/test/test_posixpath.py
@@ -201,6 +201,7 @@ class PosixPathTest(unittest.TestCase):
             with test_support.EnvironmentVarGuard() as env:
                 env['HOME'] = '/'
                 self.assertEqual(posixpath.expanduser("~"), "/")
+                self.assertEqual(posixpath.expanduser("~/foo"), "/foo")
 
     def test_normpath(self):
         self.assertEqual(posixpath.normpath(""), ".")
diff --git a/Misc/ACKS b/Misc/ACKS
index 2fb33823edb..ca9d4f28b66 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -274,6 +274,7 @@ Doug Fort
 John Fouhy
 Martin Franklin
 Robin Friedrich
+Bradley Froehle
 Ivan Frohne
 Jim Fulton
 Tadayoshi Funaba
diff --git a/Misc/NEWS b/Misc/NEWS
index 29e6dadaa52..7dbeb9e2292 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -60,6 +60,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'.
+
 - Issue #13183: Fix pdb skipping frames after hitting a breakpoint and running
   step.  Patch by Xavier de Gaye.