Swift 在专用pod上执行lint命令时出错；在验证过程中遇到未知错误（没有将nil隐式转换为字符串）。”；

我正在根据另一个私有pod创建一个私有pod当我不添加任何依赖项时，linter工作得很好，但是当我添加依赖项并运行lint命令时，它会给我这个错误

Encountered an unknown error (no implicit conversion of nil into String) during validation.

皮棉命令：

pod spec lint --private --sources=https://github.com/*****/****.git 

这是我的podSpec，它有什么问题，我应该怎么做才能解决

Pod::Spec.new do |s|

s.name         = "****Framework"
s.version      = "1.0.0"
s.summary      = "Summary  ................."
s.homepage     = "https://github.com/****/****Framework"
s.description  = "Description ................."
s.license      = "Simplified BSD license"
s.author       = { "Nahla Mortada" => "nahla.mortada@****.com" }
s.platform     = :ios, "9.0"
s.ios.deployment_target = "9.0"
s.source   = { :git => "https://github.com/****/****Framework.git", :tag => s.version }
s.source_files = "****Framework/*.swift"
s.pod_target_xcconfig =  {
'SWIFT_VERSION' => '3.0',
}
s.requires_arc = true
s.dependency '****'

end

完全错误：

ERROR | [iOS] unknown: Encountered an unknown error (no implicit conversion of nil into String
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification.rb:531:in `initialize'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification.rb:531:in `new'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification.rb:531:in `from_file'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification/set.rb:45:in `specification'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/source.rb:265:in `search'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/source/aggregate.rb:83:in `block in search'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/source/aggregate.rb:83:in `select'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-core-1.2.0/lib/cocoapods-core/source/aggregate.rb:83:in `search'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:347:in `create_set_from_sources'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:317:in `find_cached_set'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:290:in `specifications_for_dependency'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:108:in `search_for'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:206:in `block in sort_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:200:in `each'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:200:in `sort_by'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:200:in `sort_dependencies'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/delegates/specification_provider.rb:52:in `block in sort_dependencies'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/delegates/specification_provider.rb:69:in `with_no_such_dependency_error_handling'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/delegates/specification_provider.rb:51:in `sort_dependencies'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:446:in `push_state_for_requirements'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:438:in `require_nested_dependencies_for'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:422:in `activate_spec'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:388:in `attempt_to_activate_new_spec'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:319:in `attempt_to_activate'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:137:in `process_topmost_state'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolution.rb:78:in `resolve'
/Library/Ruby/Gems/2.0.0/gems/molinillo-0.5.5/lib/molinillo/resolver.rb:42:in `resolve'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:62:in `resolve'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/installer/analyzer.rb:719:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/installer/analyzer.rb:717:in `resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/installer/analyzer.rb:76:in `analyze'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/installer.rb:236:in `analyze'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/installer.rb:150:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/installer.rb:149:in `resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:405:in `block in download_pod'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:405:in `each'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:405:in `download_pod'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:301:in `block in perform_extensive_analysis'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:295:in `each'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:295:in `perform_extensive_analysis'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:79:in `validate'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/command/spec/lint.rb:64:in `block in run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/command/spec/lint.rb:53:in `each'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/command/spec/lint.rb:53:in `run'
/Library/Ruby/Gems/2.0.0/gems/claide-1.0.1/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.2.0/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'
) during validation.

ERROR |[iOS]未知：遇到未知错误（没有将nil隐式转换为字符串）
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification.rb:531:in'initialize'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification.rb:531:in'new'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification.rb:531:in“from_文件”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/specification/set.rb:45:in“specification”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/source.rb:265:in'search'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/source/aggregate.rb:83:“搜索中的块”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/source/aggregate.rb:83:in'select'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-core-1.2.0/lib/cocoapods-core/source/aggregate.rb:83:在“搜索”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:347:“从源创建集合”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:317:在“查找缓存集”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:290:in“规范”中的依赖项
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:108:“搜索”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:206:在“排序依赖项中的块”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:200:in'each'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:200:in'sort_by'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:200:in'sort_dependencies'
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/delegates/specification\u provider.rb:52:在“排序中的块依赖项”中
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/delegates/specification\u provider.rb:69:in`with_no_这类依赖性_错误处理'
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/delegates/specification\u provider.rb:51:在“排序依赖项”中
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:446:处于“按需状态”
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:438:in'require\u nested\u dependencies\u for'
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:422:in'activate_spec'
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:388:“尝试激活新规范”
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:319:在“尝试激活”中
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:137:处于“进程”状态
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolution.rb:78:in'resolve'
/Library/Ruby/Gems/2.0.0/Gems/molinillo-0.5.5/lib/molinillo/resolver.rb:42:in'resolve'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/resolver.rb:62:in'resolve'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/installer/analyzer.rb:719:in“解析依赖项中的块”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/user_interface.rb:64:in“section”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/installer/analyzer.rb:717:in'resolve_dependencies'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/installer/analyzer.rb:76:in'analyze'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/installer.rb:236:in'analyze'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/installer.rb:150:在“解析依赖项中的块”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/user_interface.rb:64:in“section”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/installer.rb:149:in“解析依赖项”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:405:in'block in download_pod'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:405:in'each'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:405:in'download_pod'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:301:“执行广泛分析中的块”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:295:in'each'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:295:in“执行广泛分析”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/validator.rb:79:in'validate'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/command/spec/lint.rb:64:in'block in run'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/command/spec/lint.rb:53:in'each'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/command/spec/lint.rb:53:in'run'
/Library/Ruby/Gems/2.0.0/Gems/claide-1.0.1/lib/claide/command.rb:334:in'run'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/lib/cocoapods/command.rb:52:in'run'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.2.0/bin/pod:55:in`'
/usr/local/bin/pod:23:in“装载”
/usr/local/bin/pod:23:in`'
)在验证期间。

尝试通过运行

rm-rf~/.CocoaPods

然后运行

pod安装程序来清除本地CocoaPods缓存

您的
podspec
似乎有效，如果这没有帮助，您应该尝试取消对
s.dependency
的注释并再次删除它，因为dependency pod可能也是导致此崩溃的原因。
添加--ver