i从2.1升级到2.4（Ruby24，Ruby24-Devel），Bundler（版本：1.17.3），Nokogiri（版本：1.6.8），Rails（版本：版本：4.0）。1），独角兽（版本：5.0.1），Therubyracer（版本：0.12.3）。有以下失败：
> INFO -- : Refreshing Gem list
> /usr/local/share/ruby/gems/2.4/gems/activesupport-4.0.1/lib/active_support/values/time_zone.rb:282:
> warning: circular argument reference - now
> /usr/local/share/ruby/gems/2.4/gems/rbhive-0.5.1/lib/rbhive/t_c_l_i_schema_definition.rb:10:
> warning: key :bigint is duplicated and overwritten on line 14
> /usr/local/share/ruby/gems/2.4/gems/activesupport-4.0.1/lib/active_support/core_ext/numeric/time.rb:50:in
> `*': ActiveSupport::Duration can't be coerced into Integer (TypeError)
> from /usr/local/share/ruby/gems/2.4/gems/activesupport-4.0.1/lib/active_support/core_ext/numeric/time.rb:50:in
> `days'
> from /usr/local/share/ruby/gems/2.4/gems/activesupport-4.0.1/lib/active_support/core_ext/numeric/time.rb:55:in
> `weeks'
> from /usr/local/share/ruby/gems/2.4/gems/devise-3.2.2/lib/devise.rb:131:in
> `<module:Devise>'
> from /usr/local/share/ruby/gems/2.4/gems/devise-3.2.2/lib/devise.rb:8:in
> `<top (required)>'
> from /usr/local/share/ruby/gems/2.4/gems/bundler-1.17.3/lib/bundler/runtime.rb:81:in
> `require'
> from /usr/local/share/ruby/gems/2.4/gems/bundler-1.17.3/lib/bundler/runtime.rb:81:in
> `block (2 levels) in require'
> from /usr/local/share/ruby/gems/2.4/gems/bundler-1.17.3/lib/bundler/runtime.rb:76:in
> `each'
我想知道是否有人知道该怎么办
这来自rails使用的activesupport GEM。因此，您的rails和ruby版本之间存在版本兼容性问题。如果要升级ruby，有时您应该相应地升级rails版本。因此，有两种解决这个问题的方法。逐步降低Ruby版本或升级Rails版本。