`jekyll serve --livereload` breaks with "undefined method `<<' for #<Http::NativeParser"

[maiamcc]

Neat theme! Had some trouble getting it working on my site. Here's the issue as replicated in this repo, with no changes except adding webrick so Jekyll can actually serve[^1]. (I tried to get up and running with gulp like the readme recommends, but I ran into the same issue as #104 so I then started trying to serve directly with Jekyll commands.)

Software versions

• MacOS Monterey v12.3.1
• ruby v3.0.0
• Bundler v2.3.7
• ??? (Any other info I can provide? I'm not a ruby person so I don't know what's up)

Repro steps

• pull down this repo
• bundle install
• bundle add webrick
• bundle exec jekyll serve --livereload

I can open the site at localhost:4000 fine, but when I try to navigate to another page of the site, jekyll serve breaks with the following:

$ bundle exec jekyll serve --livereload --trace
Configuration file: /Users/maiamccormick/code/long-haul/_config.yml
            Source: /Users/maiamccormick/code/long-haul
       Destination: /Users/maiamccormick/code/long-haul/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
                    done in 1.183 seconds.
 Auto-regeneration: enabled for '/Users/maiamccormick/code/long-haul'
LiveReload address: http://127.0.0.1:35729
    Server address: http://127.0.0.1:4000
  Server running... press ctrl-c to stop.
LiveReload experienced an error. Run with --trace for more information.
LiveReload experienced an error. Run with --trace for more information.
#<Thread:0x00007fc777572df8 /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/jekyll-4.2.2/lib/jekyll/commands/serve/live_reload_reactor.rb:41 run> terminated with exception (report_on_exception is true):
/Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/jekyll-4.2.2/lib/jekyll/commands/serve/websockets.rb:44:in `dispatch': undefined method `<<' for #<Http::NativeParser:0x00007fc777253898 @method=nil, @path=nil, @version=nil, @headers={}, @body=nil, @state=:request_line, @options={:max_header_length=>10240, :max_headers=>100, :min_tempfile_size=>1048576, :tempfile_class=>Tempfile}> (NoMethodError)
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/em-websocket-0.5.3/lib/em-websocket/connection.rb:79:in `receive_data'
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/eventmachine-1.2.7/lib/eventmachine.rb:195:in `run_machine'
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/eventmachine-1.2.7/lib/eventmachine.rb:195:in `run'
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/jekyll-4.2.2/lib/jekyll/commands/serve/live_reload_reactor.rb:44:in `block in start'
bundler: failed to load command: jekyll (/Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/bin/jekyll)
/Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/jekyll-4.2.2/lib/jekyll/commands/serve/websockets.rb:44:in `dispatch': undefined method `<<' for #<Http::NativeParser:0x00007fc777253898 @method=nil, @path=nil, @version=nil, @headers={}, @body=nil, @state=:request_line, @options={:max_header_length=>10240, :max_headers=>100, :min_tempfile_size=>1048576, :tempfile_class=>Tempfile}> (NoMethodError)
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/em-websocket-0.5.3/lib/em-websocket/connection.rb:79:in `receive_data'
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/eventmachine-1.2.7/lib/eventmachine.rb:195:in `run_machine'
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/eventmachine-1.2.7/lib/eventmachine.rb:195:in `run'
    from /Users/maiamccormick/code/long-haul/_vendor/ruby/3.0.0/gems/jekyll-4.2.2/lib/jekyll/commands/serve/live_reload_reactor.rb:44:in `block in start'

I've got no idea what's going on here, and livereload (or equivalent) is pretty crucial to my workflow. Thoughts?

[^1]: as per the Jekyll quickstart guide, you need to install webrick for jekyll serve to work with Ruby 3+

[maiamcc]

No idea if it's relevant (as I said, I'm not a ruby person) but the diff to my Gemfile.lock after all the installations above:

[brianmaierjr]

Working on fixing this! Sorry about the late reply.

[brianmaierjr]

@maiamcc I am having no luck with this issue. I previously used Gulp and Browsersync to do the live reloading but I've since removed that. Unfortunately, your problem persists. I will keep looking but wanted to give an update.

[maiamcc]

Thanks for looking into it, much appreciated!

[yabozdar]

Livereload doesn't break anymore. Check the pull request.

[maiamcc]

Hm I just pulled the latest master and livereload... just seems to work now, even without #123? So uh, thanks!

[brianmaierjr]

Well that's interesting. I'll take a look tomorrow! I have been quite busy so thanks for checking this out @maiamcc and thanks again for your pr @iambozdar