A snippet containing a small edge case bug.

gui-completion.c

                index2 = (completion->direction < 0) ? index - 1 : index + 1;
                while ((index2 >= 0) && (index2 < completion->list->size))
                {
                    ptr_completion_word2 =
                        (struct t_gui_completion_word *)(completion->list->data[index2]);
                    if ((ptr_completion_word->nick_completion
                         && (gui_completion_nickncmp (completion->base_word,
                                                      ptr_completion_word2->word,
                                                      length) == 0))
                        || (!ptr_completion_word->nick_completion
                            && (string_strncasecmp (completion->base_word,
                                                    ptr_completion_word2->word,
                                                    length) == 0)))
                    {
                        other_completion++;
                    }

                    index2 = (completion->direction < 0) ?
                        index2 - 1 : index2 + 1;
                }