'require'：无法加载此类文件 -- rdoc (LoadError)

Question

在尝试运行"irb"时，我遇到了这个错误：

<internal:/usr/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- rdoc (LoadError)

从

from <internal:/usr/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
from /usr/lib/ruby/gems/3.0.0/gems/irb-1.4.1/lib/irb/input-method.rb:17:in `<top (required)>'
from /usr/lib/ruby/gems/3.0.0/gems/irb-1.4.1/lib/irb/context.rb:14:in `require_relative'
from /usr/lib/ruby/gems/3.0.0/gems/irb-1.4.1/lib/irb/context.rb:14:in `<top (required)>'
from /usr/lib/ruby/gems/3.0.0/gems/irb-1.4.1/lib/irb.rb:16:in `require_relative'
from /usr/lib/ruby/gems/3.0.0/gems/irb-1.4.1/lib/irb.rb:16:in `<top (required)>'
from <internal:/usr/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
from <internal:/usr/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
from /usr/lib/ruby/gems/3.0.0/gems/irb-1.4.1/exe/irb:9:in `<top (required)>'
from /usr/bin/irb:25:in `load'
from /usr/bin/irb:25:in `<main>'

我尝试将 ruby 版本从 3.0.3 降级到 2.7，但没有奏效; 有同样的错误。

Answer 1

对我来说，运行gem install rdoc不起作用，所以我将其添加到 Gemfile：gem "rdoc", require: false，然后运行bundle install。这奏效了。

Answer 2

我的阿尔卑斯系统上遇到了同样的问题。而不是使用gem(这不会很好地与apk配合)，sudo apk add ruby-rdoc做了这个技巧(注意：ruby-rdoc，而不是ruby-doc)。