Add +1 so allocation is over max byte length

cmaloney · cmaloney · commit 968113564e6b · 2025-11-06T21:02:10.000-08:00
On 32 bit systems with 4GB of ram there may be PY_SSIZE_T_MAX
allocatable and the testt would pass as the allocation would succeed.

Add a + 1 so that it's over the max bytes length and an OverflowError
will be raised by bytes.
diff --git a/Lib/test/test_capi/test_bytearray.py b/Lib/test/test_capi/test_bytearray.py
@@ -57,8 +57,8 @@ def test_fromstringandsize(self):
         self.assertEqual(fromstringandsize(NULL, 0), bytearray())
         self.assertEqual(len(fromstringandsize(NULL, 3)), 3)
         self.assertRaises(OverflowError, fromstringandsize, NULL, PY_SSIZE_T_MAX)
-        self.assertRaises(MemoryError, fromstringandsize, NULL,
-                          PY_SSIZE_T_MAX-sys.getsizeof(b''))
+        self.assertRaises(OverflowError, fromstringandsize, NULL,
+                          PY_SSIZE_T_MAX-sys.getsizeof(b'') + 1)
 
         self.assertRaises(SystemError, fromstringandsize, b'abc', -1)
         self.assertRaises(SystemError, fromstringandsize, b'abc', PY_SSIZE_T_MIN)
