https://github.com/python/cpython/commit/856c8119ea9d8f574dd56cf64afe19ee2e460c8b
commit: 856c8119ea9d8f574dd56cf64afe19ee2e460c8b
branch: 3.14
author: Miss Islington (bot) <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2026-07-21T06:54:27+03:00
summary:

[3.14] gh-154307: Fix TemporaryDirectory cleanup on DragonFly BSD (GH-154309) 
(GH-154312)

On DragonFly BSD, removing a file or directory with the UF_NOUNLINK flag
fails with EISDIR (IsADirectoryError) instead of EPERM, so the cleanup did
not reset the flags.  Handle IsADirectoryError the same as PermissionError.
(cherry picked from commit 1c1088b1da5a7484b7b04e90ccc47aa362e709eb)

Co-authored-by: Serhiy Storchaka <[email protected]>
Co-authored-by: Claude Opus 4.8 (1M context) <[email protected]>

files:
A Misc/NEWS.d/next/Library/2026-07-21-01-13-39.gh-issue-154307.UNFKL4.rst
M Lib/tempfile.py

diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index a34e062f8399a03..6c036d2fd51cb0f 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -915,7 +915,8 @@ def __init__(self, suffix=None, prefix=None, dir=None,
     @classmethod
     def _rmtree(cls, name, ignore_errors=False, repeated=False):
         def onexc(func, path, exc):
-            if isinstance(exc, PermissionError):
+            # On DragonFly BSD, UF_NOUNLINK removal fails with EISDIR, not 
EPERM.
+            if isinstance(exc, (PermissionError, IsADirectoryError)):
                 if repeated and path == name:
                     if ignore_errors:
                         return
diff --git 
a/Misc/NEWS.d/next/Library/2026-07-21-01-13-39.gh-issue-154307.UNFKL4.rst 
b/Misc/NEWS.d/next/Library/2026-07-21-01-13-39.gh-issue-154307.UNFKL4.rst
new file mode 100644
index 000000000000000..fdba0c2940f0050
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-07-21-01-13-39.gh-issue-154307.UNFKL4.rst
@@ -0,0 +1,3 @@
+Fix :meth:`tempfile.TemporaryDirectory.cleanup` on DragonFly BSD, where 
removing
+a file with the ``UF_NOUNLINK`` flag failed with ``EISDIR`` instead of
+``EPERM``.

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