Class BadSeq

Lib/test/test_builtin.py:1158–1162

        filter(identity, Squares(5))
        self.assertRaises(TypeError, filter)
        class BadSeq(object):
            def __getitem__(self, index):
                if index<4:
                    return 42
                raise ValueError
        self.assertRaises(ValueError, list, filter(lambda x: x, BadSeq()))
        def badfunc():
            pass