From 1c2b4dfe6708814bc3dca9652ccd33106ded95aa Mon Sep 17 00:00:00 2001
From: adhinaik13 <22je1052@iitism.ac.in>
Date: Mon, 26 Oct 2026 19:20:05 +0530
Subject: [PATCH 1/3] gh-160682: Track running function objects in
 free-threaded GC

---
 Lib/test/test_free_threading/test_gc.py | 13 +++++++++++++
 Python/gc_free_threading.c              |  5 +++++
 2 files changed, 18 insertions(+)

diff --git a/Lib/test/test_free_threading/test_gc.py b/Lib/test/test_free_threading/test_gc.py
index 30282a111345f8..b287b51826999c 100644
--- a/Lib/test/test_free_threading/test_gc.py
+++ b/Lib/test/test_free_threading/test_gc.py
@@ -97,6 +97,19 @@ def evil():
         thread.start()
         thread.join()
 
+    def test_running_method_not_collected(self):
+        class C:
+            def m(self):
+                wr = weakref.ref(C.__dict__["m"])
+                del C.m
+                gc.collect()
+                return wr() is not None
+
+            def run(self):
+                return self.m()
+
+        self.assertTrue(C().run())
+
     def test_merge_brc_queue_of_detached_thread(self):
         # GH-157838: objects queued for merging by a thread that is detached
         # (blocked in a lock acquire, sleep, etc.) are merged and freed on its
diff --git a/Python/gc_free_threading.c b/Python/gc_free_threading.c
index 6db010468456ea..6eaeeea8848cdb 100644
--- a/Python/gc_free_threading.c
+++ b/Python/gc_free_threading.c
@@ -470,6 +470,7 @@ gc_visit_thread_stacks(PyInterpreterState *interp, struct collection_state *stat
                 continue;
             }
 
+            gc_visit_stackref(f->f_funcobj);
             gc_visit_stackref(f->f_executable);
             while (top != f->localsplus) {
                 --top;
@@ -866,6 +867,10 @@ gc_visit_thread_stacks_mark_alive(PyInterpreterState *interp, gc_mark_args_t *ar
             }
 
             _PyStackRef *top = f->stackpointer;
+            if (gc_visit_stackref_mark_alive(args, f->f_funcobj) < 0) {
+                err = -1;
+                goto exit;
+            }
             if (gc_visit_stackref_mark_alive(args, f->f_executable) < 0) {
                 err = -1;
                 goto exit;

From 1a7224175da2656aa7c3f6f966a33824d2eecef8 Mon Sep 17 00:00:00 2001
From: adhinaik13 <22je1052@iitism.ac.in>
Date: Mon, 26 Oct 2026 19:31:04 +0530
Subject: [PATCH 2/3] gh-160682: Add NEWS entry

---
 .../Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst   | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst
new file mode 100644
index 00000000000000..5c783665e78965
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst
@@ -0,0 +1,2 @@
+Fix a bug in the :term:`free-threaded build` where garbage collection could
+prematurely collect the function object of a running method.

From 79b03ded82b96d0a2c11901d2fc82b03ac07179e Mon Sep 17 00:00:00 2001
From: adhinaik13 <22je1052@iitism.ac.in>
Date: Mon, 26 Oct 2026 19:34:36 +0530
Subject: [PATCH 3/3] gh-160682: Fix NEWS entry filename

---
 ...-160682.rst => 2026-10-26-12-00-00.gh-issue-160682.Q7mK2x.rst} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename Misc/NEWS.d/next/Core_and_Builtins/{2026-10-26-12-00-00.gh-issue-160682.rst => 2026-10-26-12-00-00.gh-issue-160682.Q7mK2x.rst} (100%)

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.Q7mK2x.rst
similarity index 100%
rename from Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.rst
rename to Misc/NEWS.d/next/Core_and_Builtins/2026-10-26-12-00-00.gh-issue-160682.Q7mK2x.rst