self.assertRaises((MemoryError, OverflowError), mul, lst, n)

self.assertRaises((MemoryError, OverflowError), imul, lst, n)

def test_list_resize_overflow(self):

# gh-97616: test new_allocated * sizeof(PyObject*) overflow

# check in list_resize()

lst = [0] * 65

del lst[1:]

self.assertEqual(len(lst), 1)

size = ((2 ** (tuple.__itemsize__ * 8) - 1) // 2)

with self.assertRaises((MemoryError, OverflowError)):

lst * size

with self.assertRaises((MemoryError, OverflowError)):

lst *= size

def test_repr_large(self):

# Check the repr of large list objects

def check(n):

Fix multiplying a list by an integer (``list *= int``): detect the integer

overflow when the new allocated length is close to the maximum size. Issue

reported by Jordan Limor. Patch by Victor Stinner.

if (newsize == 0)

new_allocated = 0;

num_allocated_bytes = new_allocated * sizeof(PyObject *);

items = (PyObject **)PyMem_Realloc(self->ob_item, num_allocated_bytes);

if (new_allocated <= (size_t)PY_SSIZE_T_MAX / sizeof(PyObject *)) {

num_allocated_bytes = new_allocated * sizeof(PyObject *);

items = (PyObject **)PyMem_Realloc(self->ob_item, num_allocated_bytes);

}

else {

// integer overflow

items = NULL;

}

if (items == NULL) {

PyErr_NoMemory();

return -1;