我最近将我的 OSX 从雪豹升级到山狮，并且遇到了一个问题，即我的 xCode 在打开任何项目后 5 秒内 100% 的时间关闭。这是给出的错误消息。我试过用谷歌搜索错误，但找不到有关该主题的任何信息。
打开任何项目时都会出现错误，而不仅仅是自动布局的项目。消息“等待其他符号复制”出现在顶部的状态栏中，然后 xCode 崩溃，但下面列出了异常。
我记得xCode在OSX升级后要求我安装一些额外的组件，但在安装过程中它崩溃了，没有再问我。
我尝试通过应用商店重新安装 xCode，但这并没有解决问题。
如何修复/修复我的 xCode 安装以修复错误？
Process: Xcode [2957]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 4.6.3 (2068)
Build Info: IDEApplication-2068000000000000~3
App Item ID: 497799835
App External ID: 15588541
Code Type: X86-64 (Native)
Parent Process: launchd [130]
User ID: 501
Date/Time: 2013-07-11 08:14:22.608 -0400
OS Version: Mac OS X 10.8.4 (12E55)
Report Version: 10
Interval Since Last Report: 2375 sec
Crashes Since Last Report: 1
Per-App Interval Since Last Report: 18 sec
Per-App Crashes Since Last Report: 1
Anonymous UUID: F0403235-5ECB-ADEA-6618-E5526B9FE281
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
ProductBuildVersion: 4H1503
ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-2083/IBPlugin/Utilities/IBObjectMarshalling.m:651
Details: Failed to run one shot request for IBNSLayoutConstraint, IBUIImageView, IBUILabel, IBUITableViewCell, and IBUIView.
Interface Builder encountered an error communicating with the iOS Simulator. If you choose to file a crash report or radar for this issue, please check Console.app for crash reports for "Interface Builder Cocoa Touch Tool" and include their content in your crash report.
Exception name: IBAssertionFailure
Exception reason: ASSERTION FAILURE: [[self constant] symbolicValue] || (floor(constantValue) == constantValue)
Reason: Constraint constants should be integral (constant attempted to be set to -10.500000). Foundation will always integralize the output anyways, so if constants are not integralized, this will almost always lead to arbitration failures. Constraint is <IBNSLayoutConstraint: 0x8191060> UILabel[0x817b130].Center X = UITableViewCell[0x8183690].Center X - 10.500000 containingView={<(null):0x0>} scoreVector=<0.000000, 3, 1, 1000.000000, 0>, roundingAdjustment=0
File: /SourceCache/IBAutolayoutFoundationIOS/IBAutolayoutFoundation-2065/Framework/Classes/Model/Constraints/IBNSLayoutConstraint.m:460
Method: -[IBNSLayoutConstraint assertConstraintValidity]
Exception backtrace:
0. CoreFoundation 0x022ad012 __exceptionPreprocess
1. libobjc.A.dylib 0x0170ce7e objc_exception_throw
2. CoreFoundation 0x02335fb1 -[NSException raise]
3. IBAutolayoutFoundation 0x0008be44 -[IBNSLayoutConstraint assertConstraintValidity]
4. IBAutolayoutFoundation 0x0007b97f -[IBLayoutConstraint initWithFirstItem:firstAttribute:relation:secondItem:secondAttribute:constant:]
5. IBAutolayoutFoundation 0x000899d2 -[IBNSLayoutConstraint initWithFirstItem:firstAttribute:relation:secondItem:secondAttribute:constant:]
6. IBAutolayoutFoundation 0x0007c1ca -[IBLayoutConstraint copyWithZone:]
7. IBAutolayoutFoundation 0x00089dfe -[IBNSLayoutConstraint copyWithZone:]
8. libobjc.A.dylib 0x01720ae9 -[NSObject copy]
9. IBAutolayoutFoundation 0x0007e0e5 -[IBLayoutConstraint constraintByReplacingView:withView:andReplacingView:withView:]
10. IBAutolayoutFoundation 0x000ac46b -[IBAutolayoutEngine representedConstraintBySubstitutingRealViewsForRepresentedViewsOfConstraint:]
11. IBAutolayoutFoundation 0x000ac5f6 -[IBAutolayoutEngine addRepresentedConstraintForRealConstraint:]
12. IBAutolayoutFoundation 0x000ae959 -[IBAutolayoutEngine constraintsMakingSystemOverConstrainedByAddingConstraint:toView:]
13. IBAutolayoutFoundation 0x000b803a +[IBAutolayoutArbiter attemptToAddConstraint:byModifyingLayoutEngine:mutuallyExclusiveConstraintBreakageStrategy:mutableConstraintsToAdd:mutableConstraintsToRemove:]
14. IBAutolayoutFoundation 0x000ace27 -[IBAutolayoutEngine performEngineBootstrappingConstraintAdditionOperationForAddingConstraint:]
15. IBAutolayoutFoundation 0x000ad46e __90-[IBAutolayoutEngine iterateViewsAndGenerateRepresentedConstraintsAndMapToRealConstraints]_block_invoke404
16. CoreFoundation 0x0229acdf __NSDictionaryEnumerate
17. CoreFoundation 0x0229a87d -[NSDictionary enumerateKeysAndObjectsWithOptions:usingBlock:]
18. CoreFoundation 0x0229a7c5 -[NSDictionary enumerateKeysAndObjectsUsingBlock:]
19. IBAutolayoutFoundation 0x000ad150 -[IBAutolayoutEngine iterateViewsAndGenerateRepresentedConstraintsAndMapToRealConstraints]
20. IBAutolayoutFoundation 0x000a7db9 -[IBAutolayoutEngine initWithArbitrationUnit:options:]
21. IBAutolayoutFoundation 0x000c1454 -[IBAutolayoutFrameDecisionDriver initWithArbitrationUnit:options:]
22. ??? 0x0000c5a9 [IBCocoaTouchTool _startAutolayoutFrameDecisionSessionWithRequest:document:]
23. ??? 0x0000d49c [IBCocoaTouchTool runOneShotIncrementalFrameDecisionRequest:withFrameDecisionSessionRequest:document:]
24. ??? 0x00034fa5 [IBMessageReceiveChannel deliverMessage:toTarget:withArguments:result:]
25. ??? 0x00034cea [IBMessageReceiveChannel deliverMessage:toTarget:withArguments:result:]
26. ??? 0x000349d5 [IBMessageReceiveChannel runBlockingReceiveLoopNotifyingQueue:notifyingTarget:]
27. libdispatch.dylib 0x04c4c731 _dispatch_barrier_sync_f_slow_invoke
28. libdispatch.dylib 0x04c5b014 _dispatch_client_callout
29. libdispatch.dylib 0x04c4b7d5 _dispatch_main_queue_callback_4CF
30. CoreFoundation 0x02253af5 __CFRunLoopRun
31. CoreFoundation 0x02252f44 CFRunLoopRunSpecific
32. CoreFoundation 0x02252e1b CFRunLoopRunInMode
33. Foundation 0x013113ac -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
34. ??? 0x0000d981 [IBCocoaTouchTool startServingReceiveChannel:]
35. ??? 0x0000db1a [IBCocoaTouchTool startServingWithSocket:]
36. ??? 0x0000ec89 [IBCocoaTouchTool .cxx_destruct]
37. ??? 0x00002c15 ???
38. ??? 0x00000003 ???
Exception info:{
}