cocoapods生成不了.xcworkspace

在pod install或pod update过程中出现Abort trap，最终没有生成.xcworkspace，如下

...

Analyzing dependencies
Downloading dependencies
Installing AFNetworking (3.1.0)
Installing LFLiveKit (2.6)
Installing MJExtension (3.0.13)
Installing MJRefresh (3.1.12)
Installing Masonry (1.0.2)
Installing SDWebImage (3.8.2)
Installing UMengUShare (6.2.2)
Installing YYKit (1.0.9)
Generating Pods project
Abort trap: 6

解决办法如下，查看pod COMMAND的版本

pod COMMAND --version

输出1.1.0.beta.2

sudo gem uninstall cocoapods

提示你要卸载的版本，选全部最后一个

sudo gem install -n /usr/local/bin cocoapods --prepod COMMAND --version

重新安装后的版本1.2.0.rc.1

接下来pod update就正常了，可以生成.xcworkspace