self.assertIsInstance(v, RecursionError, type(v))

self.assertIn("maximum recursion depth exceeded", str(v))

@cpython_only

def test_crashcan_recursion(self):

# See bpo-33930

def foo():

o = object()

for x in range(1_000_000):

# Create a big chain of method objects that will trigger

# a deep chain of calls when they need to be destructed.

o = o.__dir__

foo()

support.gc_collect()

@cpython_only

def test_recursion_normalizing_exception(self):

# Issue #22898.

Fix segmentation fault with deep recursion when cleaning method objects.

Patch by Augusto Goulart and Pablo Galindo.

static void

meth_dealloc(PyCFunctionObject *m)

{

_PyObject_GC_UNTRACK(m);

// The Py_TRASHCAN mechanism requires that we be able to

// call PyObject_GC_UnTrack twice on an object.

PyObject_GC_UnTrack(m);

Py_TRASHCAN_BEGIN(m, meth_dealloc);

if (m->m_weakreflist != NULL) {

PyObject_ClearWeakRefs((PyObject*) m);

}

Py_XDECREF(m->m_self);

Py_XDECREF(m->m_module);

PyObject_GC_Del(m);

Py_TRASHCAN_END;

}

static PyObject *