Maximum recursion depth exceeded

[dhope-lab]

I tried crawling one website, but after it indicated

queue1|crawled1
Error: cannot crawl page
1links in the queue
Thread-1crawling set(['set([\'set(["set([\\\'https://www.cracked.com/\\\'])"])\'])'])
queue1|crawled2
Error: cannot crawl page "

it kept on calling crawl and create jobs (I guess on each other) a lot of times, then from there, called file_to_set, then indicated the recursion depth exceeded.
How can I fix this?