pod install 遇到 ：[MT] DVTAssertions: ASSERTION FAILURE in ……

termial提示

Syfll:ToChat syfll$ pod install
Analyzing dependencies

CocoaPods 0.39.0.beta.3 is available.

To update use: `gem install cocoapods --pre`

[!] This is a test version we'd love you to try.

For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.
Downloading dependencies

Installing BlocksKit (2.2.5)
Generating Pods project
2015-08-30 14:37:11.709 ruby[52035:242716] [MT] DVTAssertions: ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-8208.9/IDEFoundation/Initialization/IDEInitialization.m:590
Details:  Assertion failed: _initializationCompletedSuccessfully
Function: BOOL IDEIsInitializedForUserInteraction()
Thread:   <NSThread: 0x7fefb4375c50>{number = 1, name = main}
Hints: None
Backtrace:
  0  0x00000001058e88a8 -[DVTAssertionHandler handleFailureInFunction:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in DVTFoundation)
  1  0x00000001058e8035 _DVTAssertionHandler (in DVTFoundation)
  2  0x00000001058e82a1 _DVTAssertionFailureHandler (in DVTFoundation)
  3  0x00000001058e8203 _DVTAssertionFailureHandler (in DVTFoundation)
  4  0x0000000107643c4c IDEIsInitializedForUserInteraction (in IDEFoundation)
  5  0x000000010a29cd39 +[PBXProject projectWithFile:errorHandler:readOnly:] (in DevToolsCore)
  6  0x000000010a29e8be +[PBXProject projectWithFile:errorHandler:] (in DevToolsCore)
  7  0x00007fff8b942f44 ffi_call_unix64 (in libffi.dylib)
Abort trap: 6

解决方法：
升级cocoapods 版本（我直接升级到最新）