Leave the tests but comment them

Author: vstinner

Lib/test/test_capi/test_unicode.py

@@ -850,6 +850,10 @@ def test_fromwidechar(self):
         self.assertRaises(SystemError, fromwidechar, NULL, -2)
         self.assertRaises(SystemError, fromwidechar, NULL, PY_SSIZE_T_MIN)
 
+        # The following tests are skipped since they rely on undefined behavior
+        #self.assertRaises(MemoryError, fromwidechar, b'', PY_SSIZE_T_MAX)
+        #self.assertRaises(SystemError, fromwidechar, b'\0'*SIZEOF_WCHAR_T, PY_SSIZE_T_MIN)
+
     @support.cpython_only
     @unittest.skipIf(_testlimitedcapi is None, 'need _testlimitedcapi module')
     def test_aswidechar(self):