An error occurs when loading and using deadfinder in Ruby code.

[hahwul]

3.0.4 :001 > require 'deadfinder'
3.0.4 :002 >
3.0.4 :003 > app = DeadFinderRunner.new
3.0.4 :004 > options = {}
3.0.4 :005 > options['concurrency'] = 30
3.0.4 :006 >
3.0.4 :007 > app.run('https://www.hahwul.com/2022/09/30/deadfinder/', options)
3.0.4 :008 > puts Output
⚠︎ [undefined method `each_with_object' for nil:NilClass] https://www.hahwul.com/2022/09/30/deadfinder/
#<Concurrent::Map:0x000000013a3ee640>
 => nil

deadfinder/lib/deadfinder.rb

Line 22 in e711004

headers = options['headers'].each_with_object({}) do |header, hash|

[hahwul]

3.0.4 :012 > options['headers'] = ['1']
 => ["1"]
3.0.4 :013 > app.run('https://www.hahwul.com', options)
  ● Found 45 URLs. [anchor:29 / script:5 / link:11]
  ● Checking
  ✓ Done
 => nil