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        (struct line_info_table): Add num_sequences, remove last_line,
        add sequences.
        (add_line_info): Add new sequences as necessary.
        (compare_sequences): New function.
        (sort_line_sequences): New function.
        (decode_line_info): Initialize new fields in line table.
        Call sort_line_sequences.
        (lookup_address_in_line_info_table): Binary search for proper
        sequence.