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When I try to start Rails server, I get following error:

22: from bin/rails:4:in `<main>'
        21: from bin/rails:4:in `require'
        20: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands.rb:17:in `<top (required)>'
        19: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
        18: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:73:in `server'
        17: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:123:in `require_command!'
        16: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:123:in `require'
        15: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands/server.rb:4:in `<top (required)>'
        14: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/commands/server.rb:4:in `require'
        13: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails.rb:11:in `<top (required)>'
        12: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails.rb:11:in `require'
        11: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/application.rb:7:in `<top (required)>'
        10: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/application.rb:7:in `require'
         9: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/engine.rb:1:in `<top (required)>'
         8: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/engine.rb:1:in `require'
         7: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/railtie.rb:2:in `<top (required)>'
         6: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/railtie.rb:2:in `require'
         5: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/configuration.rb:2:in `<top (required)>'
         4: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-4.2.10/lib/rails/configuration.rb:2:in `require'
         3: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-4.2.10/lib/active_support/core_ext/object.rb:3:in `<top (required)>'
         2: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-4.2.10/lib/active_support/core_ext/object.rb:3:in `require'
         1: from /root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-4.2.10/lib/active_support/core_ext/object/duplicable.rb:106:in `<top (required)>'
/root/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-4.2.10/lib/active_support/core_ext/object/duplicable.rb:111:in `<class:BigDecimal>': undefined method `new' for BigDecimal:Class (NoMethodError)

I am using Rails on Bash in Ubuntu for Windows.

Here are the versions:

  • Rails 4.2.10
  • Ruby 2.7.1p83
  • railties-4.2.10
the Tin Man
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1 Answers1

1

You are trying to run an old version of Rails on the most recent version of Ruby, but Rails 4.2 is not compatible with Ruby 2.7.

According to "Which Ruby on Rails is compatible with which Ruby version?" downgrading to Ruby to 2.3 or 2.4 should work as a work-around.

Rails 4.2 reached end-of-life some time ago, it is now unsupported and will not get any security updates anymore. I suggest upgrading the Rails version of your application with a high priority.

the Tin Man
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spickermann
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