NEWS entry

gpshead · gpshead · commit 93d1e4806be9 · 2025-11-12T01:49:32.000Z
diff --git a/Misc/NEWS.d/next/Library/2025-11-12-01-49-03.gh-issue-137109.D6sq2B.rst b/Misc/NEWS.d/next/Library/2025-11-12-01-49-03.gh-issue-137109.D6sq2B.rst
@@ -0,0 +1,5 @@
+The :mod:`os.fork` and related forking APIs will no longer warn in the
+common case where Linux or macOS platform APIs return the number of threads
+in a process and find the answer to be 1 even when a
+:func:`os.register_at_fork` ``after_in_parent=`` callback (re)starts a
+thread.
