Xcode不断崩溃。我该怎么办？

重新安装，卸载，重新安装4.0.2不起作用

Process:         Xcode [649]
Path:            /Developer/Applications/Xcode.app/Contents/MacOS/Xcode
Identifier:      com.apple.dt.Xcode
Version:         4.0.2 (99)
Build Info:      IDEApplication-990000~53
Code Type:       X86-64 (Native)
Parent Process:  launchd [91]

Date/Time:       2011-05-15 22:13:29.007 +0700
OS Version:      Mac OS X 10.6.7 (10J869)
Report Version:  6

Interval Since Last Report:          128065 sec
Crashes Since Last Report:           7
Per-App Interval Since Last Report:  118616 sec
Per-App Crashes Since Last Report:   7
Anonymous UUID:                      B0FCFF42-38B8-4466-8161-8D3F5CEBC494

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Application Specific Information:
ProductBuildVersion: 4A2002a
Encountered multiple assertions. First assertion was: UNCAUGHT EXCEPTION (NSRangeException): *** -[NSCFString _getBlockStart:end:contentsEnd:forRange:stopAtLineSeparators:]: Range or index out of bounds
UserInfo: (null)
Hints: None
Backtrace:
  0  0x00007fff80b40796 __exceptionPreprocess (in CoreFoundation)
  1  0x00007fff821e50f3 objc_exception_throw (in libobjc.A.dylib)
  2  0x00007fff80b405d7 +[NSException raise:format:arguments:] (in CoreFoundation)
  3  0x00007fff80b40564 +[NSException raise:format:] (in CoreFoundation)
  4  0x00007fff80cb64aa -[NSString _getBlockStart:end:contentsEnd:forRange:stopAtLineSeparators:] (in Foundation)
  5  0x00007fff823f202d _NSFastFillAllLayoutHolesForGlyphRange (in AppKit)
  6  0x00007fff82948cbb -[NSTextView(NSPrivate) _ensureLayoutCompleteForVisibleRectWithExtensionFactor:minimumExtensionDistance:repetitions:] (in AppKit)
  7  0x000000010020d1a3 -[DVTSourceTextView(FoldingSupport) _ensureLayoutCompleteForVisibleRectWithExtension:] (in DVTKit)
  8  0x00007fff823ef694 -[NSTextView setNeedsDisplayInRect:avoidAdditionalLayout:] (in AppKit)
  9  0x0000000100204b15 -[DVTSourceTextView setNeedsDisplayInRect:avoidAdditionalLayout:] (in DVTKit)
 10  0x00007fff823acc3b -[NSView setNeedsDisplay:] (in AppKit)
 11  0x0000000100075614 -[NSObject(DVTPropertyLinking) dvt_addObserverWithName:toKeyPath:ofObject:block:] (in DVTFoundation)
 12  0x0000000118f0b833 -[IDESourceCodeEditor contentViewDidCompleteLayout] (in IDESourceEditor)
 13  0x0000000118f0b115 -[IDESourceCodeEditorContainerView didCompleteLayout] (in IDESourceEditor)
 14  0x00000001001d8fc0 +[DVTAutoLayoutView _recursivelyLayoutSubviewsOfView:populatingSetWithLaidOutViews:] (in DVTKit)
 15  0x000000010088c2c9 __66-[IDEEditorContext _openNavigableItem:documentExtension:document:]_block_invoke_0 (in IDEKit)
 16  0x000000010088be38 -[IDEEditorContext _performBlockInsideReentrantGuard:] (in IDEKit)
 17  0x000000010088bd08 -[IDEEditorContext _openNavigableItem:documentExtension:document:] (in IDEKit)
 18  0x00000001008bfd31 -[IDEEditorContext _openNavigableItem:documentExtension:] (in IDEKit)
 19  0x000000010088b50f -[IDEEditorContext _openNavigableItem:] (in IDEKit)
 20  0x00000001008bf033 -[IDEEditorContext _notifyDelegateAndOpenNavigableItem:documentExtensionIdentifier:locationToSelect:annotationRepresentedObject:stateDictionary:annotationWantsIndicatorAnimation:exploreAnnotationRepresentedObject:] (in IDEKit)
 21  0x00000001008bb678 -[IDEEditorContext _notifyDelegateAndOpenEditorOpenSpecifier:updateHistory:] (in IDEKit)
 22  0x00000001008bb453 -[IDEEditorContext _openEditorOpenSpecifier:updateHistory:] (in IDEKit)
 23  0x00000001008bb15e -[IDEEditorContext openEditorOpenSpecifier:] (in IDEKit)
 24  0x00000001008bb13b -[IDEEditorModeViewController openEditorOpenSpecifier:editorContext:] (in IDEKit)
 25  0x00000001008bb0f9 -[IDEEditorArea _openEditorOpenSpecifier:editorContext:takeFocus:] (in IDEKit)
 26  0x0000000100941bcb __108+[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:]_block_invoke_0 (in IDEKit)
 27  0x00000001008bae5d +[IDEEditorCoordinator _doOpenWithWorkspaceTabController:editorContext:target:allowFallback:documentURL:usingBlock:] (in IDEKit)
 28  0x0000000100941ae8 +[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:] (in IDEKit)
 29  0x00000001008ba899 -[_IDEOpenRequest _runIfNecessary] (in IDEKit)
 30  0x00000001008ba2a1 -[_IDEOpenRequest _enqueueForEventBehavior:] (in IDEKit)
 31  0x00000001008b9dab +[IDEEditorCoordinator _openRequestForEditorOpenSpecifier:workspaceTabController:editorContext:eventBehavior:takeFocus:] (in IDEKit)
 32  0x00000001008b9d00 __99+[IDEEditorCoordinator _openEditorOpenSpecifier:forWorkspaceTabController:eventBehavior:takeFocus:]_block_invoke_0 (in IDEKit)
 33  0x00000001008b9c90 _performBlockInsideReentrantGuard (in IDEKit)
 34  0x00000001008b9bff +[IDEEditorCoordinator _openEditorOpenSpecifier:forWorkspaceTabController:eventBehavior:takeFocus:] (in IDEKit)
 35  0x00000001008b98e9 +[IDEEditorCoordinator openEditorOpenSpecifier:forWorkspaceTabController:eventType:] (in IDEKit)
 36  0x000000011d964ed0 -[IDEStructureNavigator addTemplatesFromCompletedContext:] (in IDEStructureNavigator)
 37  0x00007fff80ca0562 -[NSBlockOperation main] (in Foundation)
 38  0x00007fff80c90cc4 -[__NSOperationInternal start] (in Foundation)
 39  0x00007fff80d6fae7 __doStart2 (in Foundation)
 40  0x00007fff80d6fcdf ____NSOQSchedule_block_invoke_1 (in Foundation)
 41  0x00007fff865f2284 _dispatch_call_block_and_release (in libSystem.B.dylib)
 42  0x00007fff865d0df2 _dispatch_queue_drain (in libSystem.B.dylib)
 43  0x00007fff865d169f _dispatch_queue_serial_drain_till_empty (in libSystem.B.dylib)
 44  0x00007fff8660443c _dispatch_main_queue_callback_4CF (in libSystem.B.dylib)
 45  0x00007fff80adc0c8 __CFRunLoopRun (in CoreFoundation)
 46  0x00007fff80adadbf CFRunLoopRunSpecific (in CoreFoundation)
 47  0x00007fff833ae7ee RunCurrentEventLoopInMode (in HIToolbox)
 48  0x00007fff833ae551 ReceiveNextEventCommon (in HIToolbox)
 49  0x00007fff833ae4ac BlockUntilNextEventMatchingListInMode (in HIToolbox)
 50  0x00007fff823d2e64 _DPSNextEvent (in AppKit)
 51  0x00007fff823d27a9 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit)
 52  0x00007fff8239848b -[NSApplication run] (in AppKit)
 53  0x00007fff823911a8 NSApplicationMain (in AppKit)
 54  0x0000000100000eec

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卸载xcode后，请使用雪豹磁盘重新安装系统，然后在重新安装之前从头运行所有更新。这种类型的重新安装不应影响您的数据或设置。

尽管可能值得首先通过Tianium软件在onyx中运行所有自动化任务，并看看这是否有帮助。或者手动删除xcode首选项文件。除非您需要在应用商店中发布Mac OS X应用程序，否则请使用xcode 3.2.6-它比xcode 4稳定得多。我打算至少等到Xcode 4.1之后再重试。