From 3ed66c2ca0f66c91ebd9ef1cabd6d66b730ee788 Mon Sep 17 00:00:00 2001
From: Kumar Aditya <kumaraditya@python.org>
Date: Thu, 11 Dec 2025 14:25:55 +0530
Subject: [PATCH 1/2] fix crash

---
 Lib/test/test_asyncio/test_tasks.py | 23 +++++++++++++++++++++++
 Modules/_asynciomodule.c            | 14 +++++---------
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index 9809621a324450..a3c5351fed0252 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -3045,6 +3045,26 @@ class BaseTaskIntrospectionTests:
     _enter_task = None
     _leave_task = None
     all_tasks = None
+    Task = None
+
+    def test_register_task_resurrection(self):
+        register_task = self._register_task
+        class EvilLoop:
+            def get_debug(self):
+                return False
+
+            def call_exception_handler(self, context):
+                register_task(context["task"])
+
+        async def coro_fn ():
+            pass
+
+        coro = coro_fn()
+        self.addCleanup(coro.close)
+        loop = EvilLoop()
+        with self.assertRaises(AttributeError):
+            self.Task(coro, loop=loop)
+
 
     def test__register_task_1(self):
         class TaskLike:
@@ -3175,6 +3195,7 @@ class PyIntrospectionTests(test_utils.TestCase, BaseTaskIntrospectionTests):
     _leave_task = staticmethod(tasks._py_leave_task)
     all_tasks = staticmethod(tasks._py_all_tasks)
     current_task = staticmethod(tasks._py_current_task)
+    Task = tasks._PyTask
 
 
 @unittest.skipUnless(hasattr(tasks, '_c_register_task'),
@@ -3187,10 +3208,12 @@ class CIntrospectionTests(test_utils.TestCase, BaseTaskIntrospectionTests):
         _leave_task = staticmethod(tasks._c_leave_task)
         all_tasks = staticmethod(tasks._c_all_tasks)
         current_task = staticmethod(tasks._c_current_task)
+        Task = tasks._CTask
     else:
         _register_task = _unregister_task = _enter_task = _leave_task = None
 
 
+
 class BaseCurrentLoopTests:
     current_task = None
 
diff --git a/Modules/_asynciomodule.c b/Modules/_asynciomodule.c
index 9b2b7011244d77..0e6a1e93e04f33 100644
--- a/Modules/_asynciomodule.c
+++ b/Modules/_asynciomodule.c
@@ -2990,16 +2990,12 @@ static PyType_Spec Task_spec = {
 static void
 TaskObj_dealloc(PyObject *self)
 {
-    _PyObject_ResurrectStart(self);
-    // Unregister the task here so that even if any subclass of Task
-    // which doesn't end up calling TaskObj_finalize not crashes.
-    unregister_task((TaskObj *)self);
-
-    PyObject_CallFinalizer(self);
-
-    if (_PyObject_ResurrectEnd(self)) {
-        return;
+    if (PyObject_CallFinalizerFromDealloc(self) < 0) {
+        return; // resurrected
     }
+    // unregister the task after finalization so that
+    // if the task gets resurrected, it remains registered
+    unregister_task((TaskObj *)self);
 
     PyTypeObject *tp = Py_TYPE(self);
     PyObject_GC_UnTrack(self);

From af73a7f5726fe8234bd376ccc64168c59327a22f Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Thu, 11 Dec 2025 09:03:17 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/Library/2025-12-11-09-03-07.gh-issue-142556.RuiBte.rst  | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2025-12-11-09-03-07.gh-issue-142556.RuiBte.rst

diff --git a/Misc/NEWS.d/next/Library/2025-12-11-09-03-07.gh-issue-142556.RuiBte.rst b/Misc/NEWS.d/next/Library/2025-12-11-09-03-07.gh-issue-142556.RuiBte.rst
new file mode 100644
index 00000000000000..782e62b65a36f3
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-12-11-09-03-07.gh-issue-142556.RuiBte.rst
@@ -0,0 +1 @@
+Fix crash when a task gets re-registered during finalization in :mod:`asyncio`. Patch by Kumar Aditya.