Ruby 2.4 和 Rails 4 堆栈级别太深 (SystemStackError) [英] Ruby 2.4 and Rails 4 stack level too deep (SystemStackError)

问题描述

我正在尝试在 Rails 4.0.8 中运行新创建的项目，但收到错误消息:

I'm trying to run newly created project in Rails 4.0.8 but I receive and error:

    rails s
=> Booting WEBrick
=> Rails 4.0.8 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
/usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Fixnum is deprecated
/usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Bignum is deprecated
Exiting
/usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:124:in `block (2 levels) in <class:Numeric>': stack level too deep (SystemStackError)
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
    from /usr/local/lib/ruby/gems/2.4.0/gems/activesupport-4.0.8/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>'
     ... 5532 levels...
    from /usr/local/lib/ruby/gems/2.4.0/gems/railties-4.0.8/lib/rails/commands.rb:71:in `tap'
    from /usr/local/lib/ruby/gems/2.4.0/gems/railties-4.0.8/lib/rails/commands.rb:71:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

Ruby 版本:

Rails 4.0.8

我的 Gemefile:

My Gemefile:

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.0.8'

# Use sqlite3 as the database for Active Record
gem 'sqlite3'

# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.2'

# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'

# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'

# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'

# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'

# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 1.2'
gem 'json', github: 'flori/json', branch: 'v1.8'
group :doc do
  # bundle exec rake doc:rails generates the API under doc/api.
  gem 'sdoc', require: false
end

我尝试重新安装 rails，因为在我的机器上安装了 5.0 Rails 之前.

I tried to reinstall rails because before I have 5.0 Rails installed on my machine.

本地宝石:

*** LOCAL GEMS ***

autoprefixer-rails (6.6.0)
coffee-rails (4.2.1, 4.0.1)
font-awesome-rails (4.7.0.1)
jquery-atwho-rails (1.3.2)
jquery-rails (4.2.2, 3.1.4)
rails (4.0.8, 4.0.0)
rails-dom-testing (2.0.2)
rails-html-sanitizer (1.0.3)
rails_12factor (0.0.3)
rails_serve_static_assets (0.0.5)
rails_stdout_logging (0.0.5)
sass-rails (5.0.6, 4.0.5)
sprockets-rails (3.2.0, 2.3.3, 2.0.1)

Meybe unistall:ruby 和 rails 会解决这个问题，但我不想那样做.Beasically 我想要安装两个版本的导轨，例如:导轨 4 和导轨 5.这种配置可以吗?

Meybe unistall: ruby and rails will solve this problem, but I dont want to do that. Beasically I whant to have installed both version of rails, for exampole: rails 4 and rails 5 as well. Is that configuration possible ?

推荐答案

在 Ruby 2.4 中，有一个整数类型的统一(即 Fixnum 和 Bignum 现在是非常相同的事情:Integer).这导致了与依赖于类别区分的现有 gem 的许多不兼容.

In Ruby 2.4, there was a unification of integer types (i.e. Fixnum and Bignum are now the very same thing: Integer). This results on quite a few incompatibilities with existing gems which relied on the distinction of the classes.

旧版本的 ActiveSupport 不喜欢这种统一，并在尝试序列化数据时对它嗤之以鼻.因此，您有以下两种选择之一:

Older versions of ActiveSupport are among those which don't like this unification and barf over it when trying to serialize data. As such, you have one of two options:

• 您可以将 Ruby 降级到 2.4 之前的版本，例如红宝石 2.3.x.
• 或者您可以将 Rails 升级到更新的版本.最好是 Rails 5.x.在 4.2-stable 分支中还有一个补丁，它与 Rails 4.2.8，使其成为正式支持 Ruby 2.4 的 Rails 4.2 系列的第一个版本.较早的 Rails 版本与 Ruby 2.4 不兼容.

• You can downgrade Ruby to a version earlier than 2.4, e.g. Ruby 2.3.x.
• Or you could upgrade Rails to a newer version. Preferably, that could be Rails 5.x. There is also a patch in the 4.2-stable branch which was released with Rails 4.2.8, making it the first version of the Rails 4.2 series that officially supports Ruby 2.4. Earlier Rails versions are not compatible with Ruby 2.4.

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