From 44620753a899a2f9bd1937d6aa5901f1ed87bb00 Mon Sep 17 00:00:00 2001
From: Matti Picus <matti.picus@gmail.com>
Date: Fri, 23 Oct 2020 02:58:46 +0300
Subject: backport changes from py3.6

---
 rpython/rlib/rposix.py | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'rpython')

diff --git a/rpython/rlib/rposix.py b/rpython/rlib/rposix.py
index 4c94ac3c46..c64f06b3e1 100644
--- a/rpython/rlib/rposix.py
+++ b/rpython/rlib/rposix.py
@@ -922,6 +922,11 @@ def listdir(path):
             raise OSError(get_saved_errno(), "opendir failed")
         return _listdir(dirp)
     else:  # _WIN32 case
+        if not path:
+            traits = _preferred_traits('')
+            win32traits = make_win32_traits(traits)
+            raise OSError(win32traits.ERROR_FILE_NOT_FOUND,
+                         "listdir called with invalid path")
         traits = _preferred_traits(path)
         win32traits = make_win32_traits(traits)
         path = traits.as_str0(path)
-- 
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