Xqt added a comment.
This was not due to solve_disambiguation script. Investigating in that matter, the ^C was not recognized if the async buffer exceeds max_queue_size. This happened because no page was putted to live wiki. I found another hint to the api cache while restarting the script: Could not load cache: TypeError("'int' object is not iterable)
Very strange but clearing the api_cache folder solves the problem. Maybe pywikibot.async_manager returns None?
TASK DETAIL https://phabricator.wikimedia.org/T85061
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To: Xqt Cc: Xqt, Aklapper, pywikipedia-bugs