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GH-107450: fix unexpected OverflowError in testMemoryErrorBigSource #110801

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GH-107450: fix unexpected OverflowError in testMemoryErrorBigSource #110801

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12 changes: 10 additions & 2 deletions Lib/test/test_exceptions.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
# Python test set -- part 5, built-in exceptions

import copy
import ctypes
import os
import sys
import unittest
Expand Down Expand Up @@ -318,11 +319,18 @@ def baz():
check('(yield i) = 2', 1, 2)
check('def f(*):\n pass', 1, 7)

@unittest.skipIf(ctypes.sizeof(ctypes.c_int) >= ctypes.sizeof(ctypes.c_ssize_t),
"INT_MAX is bigger than Py_ssize_t, so this is unreachable")
@support.requires_resource('cpu')
@support.bigmemtest(support._2G, memuse=1.5)
def testMemoryErrorBigSource(self, _size):
with self.assertRaises(OverflowError):
exec(f"if True:\n {' ' * 2**31}print('hello world')")
# the line length needs to be more than INT_MAX, but we can't
# multiple a sequence by a number that doesn't fit Py_ssize_t,
# otherwise we will get an OverflowError (see PySequence_Repeat)
INT_MAX = 2 ** (ctypes.sizeof(ctypes.c_int) * 8)
padding = ' ' * (INT_MAX // 8)
with self.assertRaisesRegex(OverflowError, "column offset overflow"):
exec(f"if True:\n {padding}print('hello world')")

@cpython_only
def testSettingException(self):
Expand Down