cocoaPods 使用报错NameError - uninitialized constant Concurrent::Promises

问题: 今天在终端上运行了一下下面的指令报了很长的一段错误

xxxdeiMac:xxx007$ pod install

Analyzing dependencies

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Command

/usr/local/bin/pod install

Report

• What did you do?

• What did you expect to happen?

• What happened instead?

Stack

   CocoaPods : 1.8.0.beta.2
        Ruby : ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-darwin18]
    RubyGems : 2.6.14
        Host : Mac OS X 10.14.6 (18G95)
       Xcode : 10.3 (10G8)
         Git : git version 2.20.1 (Apple Git-117)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : master - git - https://github.com/CocoaPods/Specs.git @ 19c0c0a443baf060d670f4e62b41a65787cb388f
               trunk - CDN - https://cdn.cocoapods.org/

Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.0.0
cocoapods-trunk       : 1.4.0
cocoapods-try         : 1.1.0

Podfile

platform :ios, '8.0'

target 'xxx' do

pod 'TuyaSmartHomeKit'
pod 'lottie-ios'
pod 'JPush'

end

Error

NameError - uninitialized constant Concurrent::Promises
Did you mean?  Concurrent::Promise
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/cdn_source.rb:126:in `block in versions'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/cdn_source.rb:121:in `map'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/cdn_source.rb:121:in `versions'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/specification/set.rb:99:in `block in versions_by_source'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/specification/set.rb:98:in `each'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/specification/set.rb:98:in `each_with_object'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/specification/set.rb:98:in `versions_by_source'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/specification/set.rb:56:in `specification_name'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/cdn_source.rb:212:in `search'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/source/aggregate.rb:83:in `block in search'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/source/aggregate.rb:83:in `select'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-core-1.8.0.beta.2/lib/cocoapods-core/source/aggregate.rb:83:in `search'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:416:in `create_set_from_sources'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:385:in `find_cached_set'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:360:in `specifications_for_dependency'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:165:in `search_for'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:274:in `block in sort_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:267:in `each'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:267:in `sort_by'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:267:in `sort_dependencies'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:53:in `block in sort_dependencies'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:70:in `with_no_such_dependency_error_handling'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:52:in `sort_dependencies'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:288:in `initial_state'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:210:in `start_resolution'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:168:in `resolve'
/Library/Ruby/Gems/2.3.0/gems/molinillo-0.6.6/lib/molinillo/resolver.rb:43:in `resolve'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/resolver.rb:94:in `resolve'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer/analyzer.rb:974:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer/analyzer.rb:972:in `resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer/analyzer.rb:124:in `analyze'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer.rb:410:in `analyze'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer.rb:234:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer.rb:233:in `resolve_dependencies'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/installer.rb:156:in `install!'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.3.0/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.0.beta.2/bin/pod:55:in `'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `
'

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Looking for related issues on cocoapods/cocoapods...

• pod update error with CDN
  https://github.com/CocoaPods/CocoaPods/issues/8991 [closed] [12 comments]
  a week ago

看到错误一开始有点吓到我了，但是翻译过来后，看到错误信息的最后几行语句了吗？他告诉我们类似的问题在别人那里也已经出现过了，相关问题的讨论链接地址也已经告诉我们了，相信你能找到解决方案的。

在这里说一下我自己出现的问题：

我的这个报错是Ruby引起的，在网上查了资料说是Mac更新系统后出现的，只要把Ruby更新了就解决了

在终端中输入：

sudo gem install concurrent-ruby or  sudo gem update concurrent-ruby