I am unable to open any storyboards in Xcode 9 GM because Xcode crashes immediately. I cleared out the `xcuserdata` directories from the project and the workspace to makes sure it wasn't in a bad state. Here is the crash log:
Process: Xcode [43275] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: Xcode Version: 9.0 (13247) Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: Xcode [43275] User ID: 501 Date/Time: 2017-09-18 11:04:45.027 -0600 OS Version: Mac OS X 10.13 (17A362a) Report Version: 12 Bridge OS Version: 3.0 (14Y661) Anonymous UUID: 8ACC2F1A-A912-94D5-E4A0-89FADCDEDB2C Sleep/Wake UUID: 90BFAE53-A676-4E94-8B0F-4C0DCDE64007 Time Awake Since Boot: 170000 seconds Time Since Wake: 4600 seconds System Integrity Protection: enabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Application Specific Information: ProductBuildVersion: 9A235 ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-13247/IDEKit/Application/IDEDocumentController.m:2223 Details: There can only be one document registered with a given URL. newDocument:<IBStoryboardDocument: 0x7fa25eb8da00>( 0 -[IDEEditorDocument init] (in IDEKit) 1 -[IBDocument init] (in IDEInterfaceBuilderKit) 2 -[NSDocument initForURL:withContentsOfURL:ofType:error:] (in AppKit) 3 -[IDEEditorDocument initForURL:withContentsOfURL:ofType:error:] (in IDEKit) 4 -[IBDocument initForURL:withContentsOfURL:ofType:error:] (in IDEInterfaceBuilderKit) 5 +[IDEDocumentController _newEditorDocumentWithClass:forURL:withContentsOfURL:ofType:extension:error:] (in IDEKit) 6 +[IDEDocumentController _retainedEditorDocumentForURL:type:error:] (in IDEKit) 7 +[IDEDocumentController retainedEditorDocumentForNavigableItem:forUseWithWorkspaceDocument:error:] (in IDEKit) 8 -[IDEUtilityArea computeSelectedDocumentsForNavigables:] (in IDEKit) 9 -[IDEUtilityArea _rebuildStackWithNavigableItems:] (in IDEKit) 10 -[IDEUtilityArea _rebuildCategoriesAndStack] (in IDEKit) 11 -[DVTDelayedInvocation runBlock:] (in DVTFoundation) 12 performSelectorWithObject__DVTMainThreadLatencyChecker__ (in DVTFoundation) 13 __NSFirePerformWithOrder (in Foundation) 14 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (in CoreFoundation) 15 __CFRunLoopDoObservers (in CoreFoundation) 16 __CFRunLoopRun (in CoreFoundation) 17 CFRunLoopRunSpecific (in CoreFoundation) 18 RunCurrentEventLoopInMode (in HIToolbox) 19 ReceiveNextEventCommon (in HIToolbox) 20 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) 21 _DPSNextEvent (in AppKit) 22 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit) 23 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit) 24 -[NSApplication run] (in AppKit) 25 NSApplicationMain (in AppKit) 26 start (in libdyld.dylib) ), existingDocument:<IBStoryboardDocument: 0x7fa263933a00>( 0 -[IDEEditorDocument init] (in IDEKit) 1 -[IBDocument init] (in IDEInterfaceBuilderKit) 2 -[NSDocument initForURL:withContentsOfURL:ofType:error:] (in AppKit) 3 -[IDEEditorDocument initForURL:withContentsOfURL:ofType:error:] (in IDEKit) 4 -[IBDocument initForURL:withContentsOfURL:ofType:error:] (in IDEInterfaceBuilderKit) 5 +[IDEDocumentController _newEditorDocumentWithClass:forURL:withContentsOfURL:ofType:extension:error:] (in IDEKit) 6 -[IDEEditorContext _newEditorDocumentWithClass:forURL:withContentsOfURL:ofType:extension:error:] (in IDEKit) 7 -[IDEEditorContext _openNavigableItem:withContentsOfURL:documentExtension:shouldInstallEditorBlock:] (in IDEKit) 8 -[IDEEditorContext _openNavigableItem:withContentsOfURL:shouldInstallEditorBlock:] (in IDEKit) 9 -[IDEEditorContext _notifyDelegateAndOpenNavigableItem:withContentsURL:documentExtensionIdentifier:locationToSelect:annotationRepresentedObject:stateDictionary:annotationWantsIndicatorAnimation:exploreAnnotationRepresentedObject:highlightSelection:alwaysReplaceExistingNavigableItem:skipSubDocumentNavigationUnlessEditorIsReplaced:] (in IDEKit) 10 -[IDEEditorContext _notifyDelegateAndOpenEditorOpenSpecifier:updateHistory:] (in IDEKit) 11 -[IDEEditorContext openEditorOpenSpecifier:updateHistory:] (in IDEKit) 12 -[IDEEditorContext openEditorOpenSpecifier:] (in IDEKit) 13 -[IDEEditorModeViewController openEditorOpenSpecifier:editorContext:] (in IDEKit) 14 -[IDEEditorArea _openEditorOpenSpecifier:editorContext:takeFocus:] (in IDEKit) 15 __108+[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:]_block_invoke_2 (in IDEKit) 16 __108+[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:]_block_invoke (in IDEKit) 17 +[IDEEditorCoordinator _doOpenWithWorkspaceTabController:editorContext:target:allowFallback:documentURL:usingBlock:] (in IDEKit) 18 +[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:] (in IDEKit) 19 -[_IDEOpenRequest _primitiveRunIfNecessary] (in IDEKit) 20 -[_IDEOpenRequest _runIfNecessary] (in IDEKit) 21 performSelector__DVTMainThreadLatencyChecker__ (in DVTFoundation) 22 __NSFireDelayedPerform (in Foundation) 23 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation) 24 __CFRunLoopDoTimer (in CoreFoundation) 25 __CFRunLoopDoTimers (in CoreFoundation) 26 __CFRunLoopRun (in CoreFoundation) 27 CFRunLoopRunSpecific (in CoreFoundation) 28 RunCurrentEventLoopInMode (in HIToolbox) 29 ReceiveNextEventCommon (in HIToolbox) 30 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) 31 _DPSNextEvent (in AppKit) 32 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit) 33 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit) 34 -[NSColorPanel _loadColorPickers] (in AppKit) 35 -[NSColorPanel _colorPanelDidLoad] (in AppKit) 36 -[NSColorPanel initWithContentRect:styleMask:backing:defer:] (in AppKit) 37 -[NSColorPanel init] (in AppKit) 38 +[NSColorPanel sharedColorPanel] (in AppKit) 39 -[IBTargetRuntime installColorListIfNeeded] (in IDEInterfaceBuilderKit) 40 -[IBCocoaTouchTargetRuntime installColorListIfNeeded] (in IDEInterfaceBuilderCocoaTouchIntegration) 41 -[IBCocoaTouchTargetRuntime installColorListIfNeeded] (in IDEInterfaceBuilderCocoaTouchIntegration) 42 -[IBDocument setTargetRuntime:] (in IDEInterfaceBuilderKit) 43 -[IBDocument decodeContentsOfURL:ofType:decodingStyle:error:] (in IDEInterfaceBuilderKit) 44 -[IBDocument readFromURL:ofType:error:] (in IDEInterfaceBuilderKit) 45 -[NSDocument _initForURL:withContentsOfURL:ofType:error:] (in AppKit) 46 -[NSDocument initForURL:withContentsOfURL:ofType:error:] (in AppKit) 47 -[IDEEditorDocument initForURL:withContentsOfURL:ofType:error:] (in IDEKit) 48 -[IBDocument initForURL:withContentsOfURL:ofType:error:] (in IDEInterfaceBuilderKit) 49 +[IDEDocumentController _newEditorDocumentWithClass:forURL:withContentsOfURL:ofType:extension:error:] (in IDEKit) 50 +[IDEDocumentController _retainedEditorDocumentForURL:type:error:] (in IDEKit) 51 +[IDEDocumentController retainedEditorDocumentForNavigableItem:forUseWithWorkspaceDocument:error:] (in IDEKit) 52 -[IDEUtilityArea computeSelectedDocumentsForNavigables:] (in IDEKit) 53 -[IDEUtilityArea _rebuildStackWithNavigableItems:] (in IDEKit) 54 -[IDEUtilityArea _rebuildCategoriesAndStack] (in IDEKit) 55 -[DVTDelayedInvocation runBlock:] (in DVTFoundation) 56 performSelectorWithObject__DVTMainThreadLatencyChecker__ (in DVTFoundation) 57 __NSFirePerformWithOrder (in Foundation) 58 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (in CoreFoundation) 59 __CFRunLoopDoObservers (in CoreFoundation) 60 __CFRunLoopRun (in CoreFoundation) 61 CFRunLoopRunSpecific (in CoreFoundation) 62 RunCurrentEventLoopInMode (in HIToolbox) 63 ReceiveNextEventCommon (in HIToolbox) 64 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) 65 _DPSNextEvent (in AppKit) 66 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit) 67 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit) 68 -[NSApplication run] (in AppKit) 69 NSApplicationMain (in AppKit) 70 start (in libdyld.dylib) ) Object: <IDEDocumentController: 0x7fa26141b600> Method: -addDocument: Thread: <NSThread: 0x7fa2614199c0>{number = 1, name = main} Hints: Backtrace: 0 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit) 1 _DVTAssertionHandler (in DVTFoundation) 2 _DVTAssertionFailureHandler (in DVTFoundation) 3 -[IDEDocumentController addDocument:] (in IDEKit) 4 +[IDEDocumentController retainEditorDocument:] (in IDEKit) 5 +[IDEDocumentController _retainedEditorDocumentForURL:type:error:] (in IDEKit) 6 +[IDEDocumentController retainedEditorDocumentForNavigableItem:forUseWithWorkspaceDocument:error:] (in IDEKit) 7 -[IDEUtilityArea computeSelectedDocumentsForNavigables:] (in IDEKit) 8 -[IDEUtilityArea _rebuildStackWithNavigableItems:] (in IDEKit) 9 -[IDEUtilityArea _rebuildCategoriesAndStack] (in IDEKit) 10 -[DVTDelayedInvocation runBlock:] (in DVTFoundation) 11 performSelectorWithObject__DVTMainThreadLatencyChecker__ (in DVTFoundation) 12 __NSFirePerformWithOrder (in Foundation) 13 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (in CoreFoundation) 14 __CFRunLoopDoObservers (in CoreFoundation) 15 __CFRunLoopRun (in CoreFoundation) 16 CFRunLoopRunSpecific (in CoreFoundation) 17 RunCurrentEventLoopInMode (in HIToolbox) 18 ReceiveNextEventCommon (in HIToolbox) 19 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) 20 _DPSNextEvent (in AppKit) 21 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit) 22 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit) 23 -[NSApplication run] (in AppKit) 24 NSApplicationMain (in AppKit) 25 start (in libdyld.dylib) abort() called