undefined method `to_i' for date in jekyll 4.0

[guoyunhe]

• I updated to the latest Jekyll (or) if on GitHub Pages to the latest github-pages
• I ran jekyll doctor to check my configuration
• I read the contributing document at https://jekyllrb.com/docs/contributing/

My Environment

Software	Version(s)
Operating System	openSUSE Tumbleweed
jekyll	4.0.0
github-pages	No

---

Expected Behaviour

Should compile

Current Behavior

Compile error:

Configuration file: /home/guo/git/suse/jekyll-theme/_config.yml
            Source: /home/guo/git/suse/jekyll-theme
       Destination: /home/guo/git/suse/jekyll-theme/_site
 Incremental build: disabled. Enable with --incremental
      Generating... 
Traceback (most recent call last):
        33: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bin/jekyll:23:in `<main>'
        32: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bin/jekyll:23:in `load'
        31: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/exe/jekyll:15:in `<top (required)>'
        30: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/mercenary-0.3.6/lib/mercenary.rb:19:in `program'
        29: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/mercenary-0.3.6/lib/mercenary/program.rb:42:in `go'
        28: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `execute'
        27: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `each'
        26: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `block in execute'
        25: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/commands/build.rb:18:in `block (2 levels) in init_with_program'
        24: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/command.rb:89:in `process_with_graceful_fail'
        23: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/command.rb:89:in `each'
        22: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/command.rb:89:in `block in process_with_graceful_fail'
        21: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/commands/build.rb:36:in `process'
        20: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/commands/build.rb:65:in `build'
        19: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/command.rb:28:in `process_site'
        18: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/site.rb:76:in `process'
        17: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/site.rb:202:in `render'
        16: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/site.rb:515:in `render_pages'
        15: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/site.rb:515:in `each'
        14: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/site.rb:516:in `block in render_pages'
        13: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/site.rb:523:in `render_regenerated'
        12: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/renderer.rb:61:in `run'
        11: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/page.rb:179:in `trigger_hooks'
        10: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/hooks.rb:101:in `trigger'
         9: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/hooks.rb:101:in `each'
         8: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/hooks.rb:102:in `block in trigger'
         7: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bundler/gems/jekyll-locale-dc5c46cadd09/lib/jekyll-locale.rb:45:in `block in <top (required)>'
         6: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bundler/gems/jekyll-locale-dc5c46cadd09/lib/jekyll/locale/mixins/support.rb:16:in `hreflangs'
         5: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bundler/gems/jekyll-locale-dc5c46cadd09/lib/jekyll/locale/mixins/support.rb:30:in `sibling_data'
         4: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bundler/gems/jekyll-locale-dc5c46cadd09/lib/jekyll/locale/mixins/support.rb:30:in `map'
         3: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bundler/gems/jekyll-locale-dc5c46cadd09/lib/jekyll/locale/mixins/support.rb:31:in `block in sibling_data'
         2: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/bundler/gems/jekyll-locale-dc5c46cadd09/lib/jekyll/locale/mixins/support.rb:24:in `publish?'
         1: from /home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/publisher.rb:10:in `publish?'
/home/guo/git/suse/jekyll-theme/vendor/bundle/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/publisher.rb:14:in `hidden_in_the_future?': undefined method `to_i' for #<Date: 2018-01-01 ((2458120j,0s,0n),+0s,2299161j)> (NoMethodError)
Did you mean?  to_s

Code Sample

I am working on this branch https://github.com/openSUSE/jekyll-theme/tree/l10n-feat

bundle exec jekyll serve --trace

Turning off year, month and day archives solved the issue:

jekyll-archives:
  enabled:
    - tags
    - categories
``

[ashmaroli]

At first glance, this issue seems to occur only when you use jekyll-archives and jekyll-locale plugins together. (Let us know if otherwise)..
Regardless, the cause would be because of:

jekyll-archives/lib/jekyll-archives/archive.rb

Lines 101 to 104 in 5ae016b

	@date ||= begin
	args = @title.values.map(&:to_i)
	Date.new(*args)
	end

Jekyll's documents tend to have an instance of Time as their date attributes.
The fix for this would be to use Time.new(*args) in the code above.