Fixed bug #81587

iterator_funcs_ptr may be null for Iterators with custom
get_iterator. Ideally MultipleIterator would make use of get_iterator,
but this would require a large implem

Fixed bug #81587

iterator_funcs_ptr may be null for Iterators with custom
get_iterator. Ideally MultipleIterator would make use of get_iterator,
but this would require a large implementation change.

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