From e2d320b33001fe58295f441b086a2af1e5d6c0d6 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Sun, 23 Nov 2025 11:16:25 +0100
Subject: [PATCH] [3.13] gh-98552: Revert (unneeded, already done elsewhere)
 "flush std streams in the multiprocessing forkserver before fork (GH-141849)"
 (GH-141871) (#141873)

gh-98552: Revert (unneeded, already done elsewhere) "flush std streams in the multiprocessing forkserver before fork (GH-141849)" (GH-141871)

Revert (unneeded, already done elsewhere) "gh-98552: flush std streams in the multiprocessing forkserver before fork (GH-141849)"

This reverts commit 58badb1711e12b6e8b5240ab96cdd01b95012de7.
(cherry picked from commit 614a28b3da1c898f29c34c14f59bf2d496dbd31d)

Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
---
 Lib/multiprocessing/forkserver.py                             | 1 -
 .../Library/2025-11-22-18-00-38.gh-issue-98552.d5KNy-.rst     | 4 ----
 2 files changed, 5 deletions(-)
 delete mode 100644 Misc/NEWS.d/next/Library/2025-11-22-18-00-38.gh-issue-98552.d5KNy-.rst

diff --git a/Lib/multiprocessing/forkserver.py b/Lib/multiprocessing/forkserver.py
index f0e94178a4af..e243442e7a15 100644
--- a/Lib/multiprocessing/forkserver.py
+++ b/Lib/multiprocessing/forkserver.py
@@ -270,7 +270,6 @@ def main(listener_fd, alive_r, preload, main_path=None, sys_path=None):
                                     len(fds)))
                         child_r, child_w, *fds = fds
                         s.close()
-                        util._flush_std_streams()
                         pid = os.fork()
                         if pid == 0:
                             # Child
diff --git a/Misc/NEWS.d/next/Library/2025-11-22-18-00-38.gh-issue-98552.d5KNy-.rst b/Misc/NEWS.d/next/Library/2025-11-22-18-00-38.gh-issue-98552.d5KNy-.rst
deleted file mode 100644
index 37a71ac1fff3..000000000000
--- a/Misc/NEWS.d/next/Library/2025-11-22-18-00-38.gh-issue-98552.d5KNy-.rst
+++ /dev/null
@@ -1,4 +0,0 @@
-The :mod:`multiprocessing` forkserver process now flushes stdout and stderr
-before it forks to avoid the confusion children inheriting any buffered but
-not yet written output data.  Normally there is none, but when using
-:func:`multiprocessing.set_forkserver_preload` there *could* be.
-- 
2.47.3