rake test fails with Ruby 3.0.0

[kenhys]

Problem

rake test fails with Ruby 3.0.0

Steps to replicate

1. clone
2. bundle install
3. CI=true rake test

Expected Behavior

CI=yes rake test succeeds.

Your environment

• OS version

% lsb_release -c
Codename:       sid

• paste result of fluentd --version or td-agent --version

% fluentd --version
fluentd 1.12.0

• plugin version
  • paste boot log of fluentd or td-agent
  • paste result of fluent-gem list, td-agent-gem list or your Gemfile.lock

Then, applied missing gems

diff --git a/fluent-plugin-irc.gemspec b/fluent-plugin-irc.gemspec
index 915455e..246e2bc 100644
--- a/fluent-plugin-irc.gemspec
+++ b/fluent-plugin-irc.gemspec
@@ -20,7 +20,9 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency "fluentd", [">= 0.14.0", "< 2"]
   s.add_runtime_dependency "irc_parser"
+  s.add_runtime_dependency "async-http"
 
   s.add_development_dependency "test-unit"
   s.add_development_dependency "rake"
+  s.add_development_dependency "webrick"
 end

After it, install dependency.

% bundle install
Warning: the running version of Bundler (2.2.3) is older than the version that created the lockfile (2.2.4). We suggest you to upgrade to the version that created the lockfile by running `gem install bundler:2.2.4`.
Using rake 13.0.3
Using fiber-local 1.0.0
Using console 1.10.1
Using nio4r 2.5.4
Using timers 4.3.2
Using async 1.28.3
Using async-io 1.30.1
Using async-pool 0.3.3
Using protocol-http 0.21.0
Using protocol-http1 0.13.2
Using protocol-hpack 1.4.2
Using protocol-http2 0.14.1
Using async-http 0.54.1
Using bundler 2.2.3
Using concurrent-ruby 1.1.7
Using cool.io 1.7.0
Using http_parser.rb 0.6.0
Using msgpack 1.3.3
Using sigdump 0.2.4
Using serverengine 2.2.2
Using strptime 0.2.5
Using tzinfo 2.0.4
Using tzinfo-data 1.2020.6
Using yajl-ruby 1.4.1
Using fluentd 1.12.0
Using irc_parser 0.1.2
Using fluent-plugin-irc 0.1.0 from source at `.`
Using power_assert 1.2.0
Using test-unit 3.3.9
Using webrick 1.7.0
Bundle complete! 4 Gemfile dependencies, 30 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.

Next, execute rake test.

/home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/singleton-0.1.1/lib/singleton.rb:141: warning: previous definition of __init__ was here
/home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/singleton.rb:152:in `undef_method': undefined method `extend_object' for class `Singleton' (NameError)
Did you mean?  extended
        from /home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/singleton.rb:152:in `singleton class'
        from /home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/singleton.rb:140:in `<module:Singleton>'
        from /home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/singleton.rb:94:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/compat/output_chain.rb:17:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/compat/output_chain.rb:17:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/compat/output.rb:27:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/compat/output.rb:27:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/output.rb:17:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/output.rb:17:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/agent.rb:19:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/agent.rb:19:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/root_agent.rb:20:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/root_agent.rb:20:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/engine.rb:21:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/engine.rb:21:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/test/base.rb:18:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/test/base.rb:18:in `<top (required)>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/test.rb:20:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/fluentd-1.12.0/lib/fluent/test.rb:20:in `<top (required)>'
        from /work/fluentd/plugins/fluent-plugin-irc/test/helper.rb:14:in `require'
        from /work/fluentd/plugins/fluent-plugin-irc/test/helper.rb:14:in `<top (required)>'
        from <internal:/home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /work/fluentd/plugins/fluent-plugin-irc/test/plugin/test_out_irc.rb:1:in `<top (required)>'
        from <internal:/home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/home/kenhys/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/rake-13.0.3/lib/rake/rake_test_loader.rb:17:in `block in <main>'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/rake-13.0.3/lib/rake/rake_test_loader.rb:5:in `select'
        from /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/rake-13.0.3/lib/rake/rake_test_loader.rb:5:in `<main>'
rake aborted!
Command failed with status (1): [ruby -w -I"lib:lib:test" /home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/rake-13.0.3/lib/rake/rake_test_loader.rb "test/plugin/test_out_irc.rb" ]
/home/kenhys/.rvm/gems/ruby-3.0.0@work/gems/rake-13.0.3/exe/rake:27:in `<top (required)>'
Tasks: TOP => test
(See full trace by running task with --trace)

[evansjp]

Also have this issue. Did you ever find a solution?