# Buggy code
def sort_index_for_equal_values(result, ascending):
    """
    Sort indices for equal values of result object.

    Parameters
    ----------
    result : pandas.Series or pandas.DataFrame with one column
        The object whose indices for equal values is needed to sort.
    ascending : boolean
        Sort in ascending (if it is True) or descending (if it is False) order.

    Returns
    -------
    pandas.DataFrame
        A new DataFrame with sorted indices.
    """
    is_range = False
    is_end = False
    i = 0
    new_index = np.empty(len(result), dtype=type(result.index))
    while i < len(result):
        j = i
        if i < len(result) - 1:
            while result[result.index[i]] == result[result.index[i + 1]]:
                i += 1
                if is_range is False:
                    is_range = True
                if i == len(result) - 1:
                    is_end = True
                    break
        if is_range:
            k = j
            for val in sorted(result.index[j : i + 1], reverse=not ascending):
                new_index[k] = val
                k += 1
            if is_end:
                break
            is_range = False
        else:
            new_index[j] = result.index[j]
        i += 1
    return pandas.DataFrame(result, index=new_index)


# Traceback (Exception)
Traceback (most recent call last):
File "test.py", line 15, in <module>
print(f"modin:\n{modin_df.sum(min_count=1)}")
File "modin\pandas\base.py", line 3512, in __str__
return repr(self)
File "modin\pandas\series.py", line 307, in __repr__
temp_df = self._build_repr_df(num_rows, num_cols)
File "modin\pandas\base.py", line 108, in _build_repr_df
return self.iloc[indexer]._query_compiler.to_pandas()
File "modin\backends\pandas\query_compiler.py", line 191, in to_pandas
return self._modin_frame.to_pandas()
File "modin\engines\base\frame\data.py", line 1801, in to_pandas
"Internal and external indices do not match.",
File "modin\error_message.py", line 54, in catch_bugs_and_request_email
" caused this error.\n{}".format(extra_log)
Exception: Internal Error. Please email bug_reports@modin.org with the traceback and command that caused this error.
Internal and external indices do not match.

# Fixed code
def sort_index_for_equal_values(result, ascending):
    """
    Sort indices for equal values of result object.

    Parameters
    ----------
    result : pandas.Series or pandas.DataFrame with one column
        The object whose indices for equal values is needed to sort.
    ascending : boolean
        Sort in ascending (if it is True) or descending (if it is False) order.

    Returns
    -------
    pandas.DataFrame
        A new DataFrame with sorted indices.
    """
    is_range = False
    is_end = False
    i = 0
    new_index = np.empty(len(result), dtype=type(result.index))
    while i < len(result):
        j = i
        if i < len(result) - 1:
            while result[result.index[i]] == result[result.index[i + 1]]:
                i += 1
                if is_range is False:
                    is_range = True
                if i == len(result) - 1:
                    is_end = True
                    break
        if is_range:
            k = j
            for val in sorted(result.index[j : i + 1], reverse=not ascending):
                new_index[k] = val
                k += 1
            if is_end:
                break
            is_range = False
        else:
            new_index[j] = result.index[j]
        i += 1
    return pandas.DataFrame(result, index=new_index, columns=["__reduced__"])