This plugin is fun to play with.
Problem: exception using title:soundex, Author:ignore. Edit: it happens for all title != ignore.
Code:
calibre, version 0.7.57
ERROR: Unhandled exception: <b>NameError</b>:global name 'not_duplicate_of_map' is not defined
Traceback (most recent call last):
File "calibre_plugins.find_duplicates.action", line 155, in toolbar_button_clicked
File "calibre_plugins.find_duplicates.action", line 150, in find_duplicates
File "calibre_plugins.find_duplicates.duplicates", line 79, in run_duplicate_check
File "calibre_plugins.find_duplicates.algorithms", line 285, in run_duplicate_check
File "calibre_plugins.find_duplicates.algorithms", line 321, in convert_candidates_to_groups
File "calibre_plugins.find_duplicates.algorithms", line 383, in partition_using_exemptions
NameError: global name 'not_duplicate_of_map' is not defined