bpo-35972: _xxsubinterpreters: Fix potential integer truncation on 32-bit in channel_send() (gh-11822)

1 files changed, 13 insertions, 1 deletions

diff --git a/Lib/test/test__xxsubinterpreters.py b/Lib/test/test__xxsubinterpreters.py
index 26032d6c85..1eece96592 100644
--- a/Lib/test/test__xxsubinterpreters.py
+++ b/Lib/test/test__xxsubinterpreters.py
@@ -393,7 +393,19 @@ class ShareableTypeTests(unittest.TestCase):
                             for i in range(-1, 258))
 
     def test_int(self):
-        self._assert_values(range(-1, 258))
+        self._assert_values(itertools.chain(range(-1, 258),
+                                            [sys.maxsize, -sys.maxsize - 1]))
+
+    def test_non_shareable_int(self):
+        ints = [
+            sys.maxsize + 1,
+            -sys.maxsize - 2,
+            2**1000,
+        ]
+        for i in ints:
+            with self.subTest(i):
+                with self.assertRaises(OverflowError):
+                    interpreters.channel_send(self.cid, i)
 
 
 ##################################