gh-145197: Fix JIT trace crash when recording function from cleared generator frame

Lib/test/test_capi/test_opt.py

@@ -4114,6 +4114,28 @@ def __init__(self, name):
              PYTHON_JIT_SIDE_EXIT_INITIAL_VALUE="1")
         self.assertEqual(result[0].rc, 0, result)
 
+    def test_for_iter_gen_cleared_frame_does_not_crash(self):
+        # See: https://github.com/python/cpython/issues/145197
+        result = script_helper.run_python_until_end('-c', textwrap.dedent("""
+        def g():
+            yield 1
+            yield 2
+
+        for _ in range(4002):
+            for _ in g():
+                pass
+
+        for i in range(4002):
+            it = g()
+            if (i & 7) == 0:
+                next(it)
+                it.close()
+            for _ in it:
+                pass
+        """),
+        PYTHON_JIT="1", PYTHON_JIT_STRESS="1")
+        self.assertEqual(result[0].rc, 0, result)
+
 def global_identity(x):
     return x
 

Misc/NEWS.d/next/Core_and_Builtins/2026-02-25-15-02-08.gh-issue-145197.G6hAUk.rst

@@ -0,0 +1 @@
+Fix JIT trace crash when recording function from cleared generator frame.

Python/bytecodes.c

@@ -5730,8 +5730,11 @@ dummy_func(
         tier2 op(_RECORD_NOS_GEN_FUNC, (nos, tos -- nos, tos)) {
             PyObject *obj = PyStackRef_AsPyObjectBorrow(nos);
             if (PyGen_Check(obj)) {
-                PyObject *func = (PyObject *)_PyFrame_GetFunction(&((PyGenObject *)obj)->gi_iframe);
-                RECORD_VALUE(func);
+                PyGenObject *gen = (PyGenObject *)obj;
+                _PyStackRef func = gen->gi_iframe.f_funcobj;
+                if (!PyStackRef_IsNull(func)) {
+                    RECORD_VALUE(PyStackRef_AsPyObjectBorrow(func));
+                }
             }
         }