[3.12] gh-79429: Ignore FileNotFoundError when remove a temporary directory in the multiprocessing finalizer (GH-112865)

Author: serhiy-storchaka

Lib/multiprocessing/util.py

@@ -130,7 +130,10 @@ def is_abstract_socket_namespace(address):
 #
 
 def _remove_temp_dir(rmtree, tempdir):
-    rmtree(tempdir)
+    def onerror(func, path, err_info):
+        if not issubclass(err_info[0], FileNotFoundError):
+            raise
+    rmtree(tempdir, onerror=onerror)
 
     current_process = process.current_process()
     # current_process() can be None if the finalizer is called

Misc/NEWS.d/next/Library/2023-12-08-11-52-08.gh-issue-79429.Nf9VK2.rst

@@ -0,0 +1,2 @@
+Ignore FileNotFoundError when remove a temporary directory in the
+multiprocessing finalizer.