grab f_generator on 3.14 no_other_refs

Author: graingert

src/trio/_core/_tests/test_run.py

@@ -2807,10 +2807,6 @@ async def spawn_tasks_in_old_nursery(task_status: _core.TaskStatus[None]) -> Non
     sys.implementation.name != "cpython",
     reason="Only makes sense with refcounting GC",
 )
-@pytest.mark.xfail(
-    sys.version_info >= (3, 14),
-    reason="https://github.com/python/cpython/issues/125603",
-)
 async def test_ki_protection_doesnt_leave_cyclic_garbage() -> None:
     class MyException(Exception):
         pass

src/trio/_core/_tests/tutil.py

@@ -117,7 +117,12 @@ def create_asyncio_future_in_new_loop() -> asyncio.Future[object]:
         return loop.create_future()
 
 
-if sys.version_info >= (3, 11):
+if sys.version_info >= (3, 14):
+
+    def no_other_refs() -> list[object]:
+        return [sys._getframe().f_generator]
+
+elif sys.version_info >= (3, 11):
 
     def no_other_refs() -> list[object]:
         return []