Issue #27114: Fix SSLContext._load_windows_store_certs fails with PermissionError

1 files changed, 3 insertions, 3 deletions

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 313fadfcbe..404e0273ec 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -182,8 +182,8 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None,
     text = "t" in modes
     binary = "b" in modes
     if "U" in modes:
-        if creating or writing or appending:
-            raise ValueError("can't use U and writing mode at once")
+        if creating or writing or appending or updating:
+            raise ValueError("mode U cannot be combined with 'x', 'w', 'a', or '+'")
         import warnings
         warnings.warn("'U' mode is deprecated",
                       DeprecationWarning, 2)
@@ -1514,7 +1514,7 @@ class FileIO(RawIOBase):
         if self._fd >= 0 and self._closefd and not self.closed:
             import warnings
             warnings.warn('unclosed file %r' % (self,), ResourceWarning,
-                          stacklevel=2)
+                          stacklevel=2, source=self)
             self.close()
 
     def __getstate__(self):