我刚刚将我的应用程序升级为使用Ruby 2.4.0，在捆绑过程中没有任何错误。但是，当我尝试启动服务器时，出现以下错误：
There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
Gem Load Error is: wrong argument type Class (expected Module)
我在本网站的其他答案中发现您需要将gem 'therubyracer'添加到您的Gemfile中，但自从我的应用程序创建以来，我已经有了这个。
最新版本的NodeJS也安装在我的机器上。
是否有其他人遇到此错误并知道如何解决？
Gemfile中的uglifier配置：gem 'uglifier', '~> 3.0.4'
完整堆栈跟踪：
/home/severin/.rvm/gems/ruby-2.4.0/gems/activesupport-5.0.1/lib/active_support/xml_mini.rb:51: warning: constant ::Fixnum is deprecated
/home/severin/.rvm/gems/ruby-2.4.0/gems/activesupport-5.0.1/lib/active_support/xml_mini.rb:52: warning: constant ::Bignum is deprecated
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:21: warning: constant ::Fixnum is deprecated
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:94:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
Gem Load Error is: wrong argument type Class (expected Module)
Backtrace for gem load error is:
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:23:in `include'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:23:in `block (2 levels) in <top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:22:in `class_eval'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:22:in `block in <top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:21:in `each'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8/conversion.rb:21:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8.rb:22:in `require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/therubyracer-0.12.2/lib/v8.rb:22:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs/ruby_racer_runtime.rb:108:in `require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs/ruby_racer_runtime.rb:108:in `available?'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:63:in `each'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:63:in `find'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:63:in `best_available'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:57:in `autodetect'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs.rb:5:in `<module:ExecJS>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/execjs-2.7.0/lib/execjs.rb:4:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/uglifier-3.0.4/lib/uglifier.rb:5:in `require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/uglifier-3.0.4/lib/uglifier.rb:5:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in `require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in `block (2 levels) in require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `each'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `block in require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `each'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler.rb:106:in `require'
/home/config/application.rb:7:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:88:in `require'
/home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:88:in `block in server'
/home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
/home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
/home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
/home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands.rb:18:in `<top (required)>'
/home/bin/rails:9:in `require'
/home/bin/rails:9:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `load'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `call'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client/command.rb:7:in `call'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client.rb:30:in `run'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/bin/spring:49:in `<top (required)>'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `load'
/home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `<top (required)>'
/home/severin/bin/spring:13:in `require'
/home/severin/bin/spring:13:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'
Bundler Error Backtrace:
from /home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:90:in `block (2 levels) in require'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `each'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `block in require'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `each'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `require'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/bundler-1.13.7/lib/bundler.rb:106:in `require'
from /home/severin/config/application.rb:7:in `<top (required)>'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:88:in `require'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:88:in `block in server'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/railties-5.0.1/lib/rails/commands.rb:18:in `<top (required)>'
from /home/severin/bin/rails:9:in `require'
from /home/severin/bin/rails:9:in `<top (required)>'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `load'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `call'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client/command.rb:7:in `call'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/client.rb:30:in `run'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/bin/spring:49:in `<top (required)>'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `load'
from /home/severin/.rvm/gems/ruby-2.4.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `<top (required)>'
from /home/severin/bin/spring:13:in `require'
from /home/severin/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
答案 0 :(得分：21)
这是uglifier存储库中的一个未解决的问题：Uglifier doesn't load with Ruby 2.4.0 using The Ruby Racer JS runtime。
它是由Ruby 2.4.0中的unification of Fixnum and Bignum into Integer引起的。 Here是解决问题的拉取请求，实际上位于therubyracer，而不是uglifier。
目前，作为临时修复，您可以将Gemfile配置为使用回购的主分支：
gem 'therubyracer', git: 'https://github.com/cowboyd/therubyracer.git'
更新：therubyracer版本0.12.3现已released，其中包含针对ruby 2.4支持的上述修复程序。