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-rw-r--r--Lib/test/test_unicode.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 2e30145414..0c82560ca7 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -2024,6 +2024,8 @@ class UnicodeTest(string_tests.CommonTest,
# test "%c"
self.assertEqual(PyUnicode_FromFormat(b'%c', c_int(0xabcd)), '\uabcd')
self.assertEqual(PyUnicode_FromFormat(b'%c', c_int(0x10ffff)), '\U0010ffff')
+ with self.assertRaises(OverflowError):
+ PyUnicode_FromFormat(b'%c', c_int(0x110000))
# Issue #18183
self.assertEqual(
PyUnicode_FromFormat(b'%c%c', c_int(0x10000), c_int(0x100000)),