commit 211e4c6e9c1ab60bb2577dda6587fbec79f679b2
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed Aug 26 17:51:44 2020 -0700
committer GitHub <noreply@github.com> Thu Aug 27 02:51:44 2020 +0200
tree e1d306e71e4a107d6fe35583fa6dcbf60edc472c
parent 9de6be4e2ae605a1deb6fa72d5c5f66b07817e4c

bpo-33660: Fix PosixPath to resolve a relative path on root (#21974)

(cherry picked from commit 94ad6c674f7687ef22853cb8d42b440d6b42ddc8)

Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>

Lib/pathlib.py

diff --git a/Lib/pathlib.py b/Lib/pathlib.py
index 9f5e27b..babc443 100644
--- a/Lib/pathlib.py
+++ b/Lib/pathlib.py
@@ -329,7 +329,10 @@
                     # parent dir
                     path, _, _ = path.rpartition(sep)
                     continue
-                newpath = path + sep + name
+                if path.endswith(sep):
+                    newpath = path + name
+                else:
+                    newpath = path + sep + name
                 if newpath in seen:
                     # Already seen this path
                     path = seen[newpath]