This issue has returned in Xcode 14.0.1 and 14.1 RC. It had been fixed in the GM of 13.3, and remained fixed through 13.4.1. Now it is back, presenting exactly as described above.

Forgot to mention that after my original post, the issue was fixed in the GM of Xcode 13.3, and continued to be fixed through 13.4.1, which is what my team is currently using on CI. We want to move to 14 or 14.1 now, but can't because this issue has returned in those versions.

This issue has returned in Xcode 14.0.1 and 14.1 Beta 3. I haven't yet tested 14.1 RC. Issue presents exactly the same as described above.

I was finally able to open my workspace successfully by holding down shift while launching Xcode. I can't remember what that does or if it's even a thing, but now I'm able to open the workspace even without holding down shift.

Thanks degennar. Looks like your crash is in the same general area (DVTFrameworks), but a different assertion failure in a different file.Mine:```ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-16126/DVTUserInterfaceKit/CustomUI/DVTTableCellView.m:178Details: Assertion failed: invalidatableObject.validObject: <DVTTableCellViewOneLine: 0x7fde6a1724f0>Method: -_startObservingAutoProperties```Yours:```ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-16126/DVTFoundation/Protocols/DVTInvalidation.m:439Details: DVTInvalidationCorePrimitiveInvalidate called twice during -invalidate: <0x7fd3d11708e0 IDEWelcomeWindowController>.Function: void DVTInvalidationCorePrimitiveInvalidate(NSObject<DVTInvalidation> * _Nonnull __strong)```So maybe they're related?

11.4 is also crashing for me soon after I open the workspace for my app project. It occurs just after indexing starts. Since I updated to 11.4, I've not been able to successfully open this project, though other, smaller projects and playgrounds open fine.I've tried:* doing a cmd-opt-shift-K clean before the indexing starts; the clean succeeds but then Xcode still crashes when the indexing starts;* deleting the Derived Data folder while Xcode isn't running, but it still crashes the same way when it starts;* `pod install`, no luck.My crash logs all look like the following snippet. Do yours?```Application Specific Information:ProductBuildVersion: 11E146ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-16126/DVTUserInterfaceKit/CustomUI/DVTTableCellView.m:178Details: Assertion failed: invalidatableObject.validObject: <DVTTableCellViewOneLine: 0x7fde6a1724f0>Method: -_startObservingAutoPropertiesThread: <NSThread: 0x7fde6ed1b720>{number = 1, name = main}Open FDs: 70/9472Hints: 0: Creation Backtrace for Notification Token: 0 -[_DVTNotificationReceiver initWithBlock:queue:] (in DVTFoundation) 1 -[NSNotificationCenter(DVTNSNotificationCenterAdditions) dvt_addObserverForName:object:queue:usingBlock:] (in DVTFoundation) 2 -[_IDENavigatorOutlineViewDataSource setRootItems:] (in IDEKit) 3 -[IDENavigatorOutlineView _updateRootItems:sortDescriptors:] (in IDEKit) 4 -[IDENavigatorOutlineView setRootItems:] (in IDEKit) 5 -[IDENavigatorOutlineView _updateBoundContentArrayOrSet] (in IDEKit) 6 -[IDENavigatorOutlineView updateBoundContentArray] (in IDEKit) 7 -[NSObject(DVTBindingUtilities) dvt_updateBoundValueForBinding:] (in DVTUserInterfaceKit) 8 -[DVTBindingHelper observeValueForKeyPath:ofObject:change:context:] (in DVTUserInterfaceKit) 9 NSKeyValueNotifyObserver (in Foundation)10 NSKeyValueDidChange (in Foundation)11 NSKeyValueDidChangeWithPerThreadPendingNotifications (in Foundation)12 -[NSKeyValueObservance observeValueForKeyPath:ofObject:change:context:] (in Foundation)13 NSKeyValueNotifyObserver (in Foundation)14 NSKeyValueDidChange (in Foundation)15 NSKeyValueDidChangeWithPerThreadPendingNotifications (in Foundation)16 -[IDENavigableItem(IDENavigableItemSubclasserExtensions) invalidateChildItems] (in IDEKit)17 -[IDEKeyDrivenNavigableItem invalidateChildItems] (in IDEKit)18 +[IDEKeyDrivenNavigableItem observeValueForKeyPath:ofObject:change:context:] (in IDEKit)19 NSKeyValueNotifyObserver (in Foundation)20 NSKeyValueDidChange (in Foundation)21 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] (in Foundation)22 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] (in Foundation)23 _NSSetObjectValueAndNotify (in Foundation)24 closure #1 in SourceControlWorkspaceHolder.loadWorkingCopies() (in IDESourceControlUI)25 closure #1 in closure #1 in SourceControlWorkingCopyHolder.performTreeBuild(_:) (in IDESourceControlUI)26 thunk for @escaping @callee_guaranteed () -> () (in IDESourceControlUI)27 -[DVTModelGraphTransactionScope performTransaction:] (in DVTFoundation)28 closure #1 in SourceControlWorkingCopyHolder.performTreeBuild(_:) (in IDESourceControlUI)29 thunk for @escaping @callee_guaranteed () -> () (in DVTFoundation)30 ___DVTCachedTimeSlicedMainThreadBlockProcessingQueueForKey_block_invoke_2 (in DVTFoundation)31 -[_DVTTimeSlicedMainThreadUnorderedNonUniquingWorkQueue _processWorkItemsWithDeadline:] (in DVTFoundation)32 -[DVTTimeSlicedMainThreadWorkQueue _processWithDeadline:] (in DVTFoundation)33 -[_DVTTimeSlicedMainThreadActiveWorkQueues _processWorkQueuesOnDeadline] (in DVTFoundation)34 __NSFireDelayedPerform (in Foundation)35 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation)36 __CFRunLoopDoTimer (in CoreFoundation)37 __CFRunLoopDoTimers (in CoreFoundation)38 __CFRunLoopRun (in CoreFoundation)39 CFRunLoopRunSpecific (in CoreFoundation)40 RunCurrentEventLoopInMode (in HIToolbox)41 ReceiveNextEventCommon (in HIToolbox)42 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox)43 _DPSNextEvent (in AppKit)44 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit)45 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit)46 -[NSApplication run] (in AppKit)47 NSApplicationMain (in AppKit)48 main (in Xcode)49 start (in libdyld.dylib)Backtrace: 0 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit) 1 _DVTAssertionHandler (in DVTFoundation) 2 _DVTAssertionFailureHandler (in DVTFoundation) 3 _DVTAssertionFailureHandler (in DVTFoundation) 4 -[DVTTableCellView _startObservingAutoProperties] (in DVTUserInterfaceKit) 5 -[DVTTableCellView setObjectValue:] (in DVTUserInterfaceKit) 6 specialized SourceControlNavigator.outlineView(_:viewFor:item:) (in IDESourceControlUI) 7 @objc SourceControlNavigator.outlineView(_:viewFor:item:) (in IDESourceControlUI) 8 -[NSTableView(NSTableViewViewBased) makeViewForTableColumn:row:] (in AppKit) 9 -[NSTableRowData _addViewToRowView:atColumn:row:] (in AppKit)10 -[NSTableRowData _addViewsToRowView:atRow:] (in AppKit)11 -[NSTableRowData _initializeRowView:atRow:] (in AppKit)12 -[NSTableRowData _preparedRowViewForRow:storageHandler:] (in AppKit)13 -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] (in AppKit)14 -[NSTableRowData _updateVisibleViewsBasedOnUpdateItems] (in AppKit)15 -[NSTableRowData _updateVisibleViewsBasedOnUpdateItemsAnimated] (in AppKit)16 -[NSTableRowData _doWorkAfterEndUpdates] (in AppKit)17 -[NSOutlineView reloadItem:reloadChildren:] (in AppKit)18 -[DVTOutlineView reloadItem:reloadChildren:] (in DVTUserInterfaceKit)19 -[IDENavigatorOutlineView reloadItem:reloadChildren:] (in IDEKit)20 __83-[_IDENavigatorOutlineViewDataSource _processNavigableItemGraphChangeNotification:]_block_invoke_2 (in IDEKit)21 +[NSAnimationContext(DVTNSAnimationContextAdditions) dvt_runWithAnimationEnabled:block:] (in DVTCocoaAdditionsKit)22 -[IDENavigatorOutlineView suspendEditingWhilePerformingBlock:] (in IDEKit)23 -[_IDENavigatorOutlineViewDataSource _processNavigableItemGraphChangeNotification:] (in IDEKit)24 __51-[_IDENavigatorOutlineViewDataSource setRootItems:]_block_invoke (in IDEKit)25 DVTInvokeWithLazyFailureHint (in DVTFoundation)26 __99+[_DVTNotificationReceiver _recieveNotification:queue:creationBacktrace:createHintGenerator:block:]_block_invoke (in DVTFoundation)27 +[_DVTNotificationReceiver _recieveNotification:queue:creationBacktrace:createHintGenerator:block:] (in DVTFoundation)28 -[_DVTNotificationReceiver receiveNotification:] (in DVTFoundation)29 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ (in CoreFoundation)30 ___CFXRegistrationPost1_block_invoke (in CoreFoundation)31 _CFXRegistrationPost1 (in CoreFoundation)32 ___CFXNotificationPost_block_invoke (in CoreFoundation)33 -[_CFXNotificationRegistrar find:object:observer:enumerator:] (in CoreFoundation)34 _CFXNotificationPost (in CoreFoundation)35 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation)36 -[NSNotificationCenter(DVTNSNotificationCenterAdditions_MRR) _dvt_postNotificationName:object:userInfo:] (in DVTFoundation)37 -[IDENavigableItemCoordinator _postNotificationNamed:forChangedItems:] (in IDEKit)38 -[IDENavigableItemCoordinator _delayedPostGraphAndPropertyChangeNotifications] (in IDEKit)39 __48-[DVTDelayedInvocation initWithTarget:selector:]_block_invoke (in DVTFoundation)40 -[DVTDelayedInvocation runBlock:] (in DVTFoundation)41 -[DVTDelayedInvocation invokeIfNeeded] (in DVTFoundation)42 -[IDENavigableItemCoordinator processPendingChanges] (in IDEKit)43 -[IDEOutlineBasedNavigator revertState] (in IDEKit)44 closure #3 in closure #1 in SourceControlNavigator.configureNavigator() (in IDESourceControlUI)45 closure #1 in closure #1 in SourceControlWorkingCopyHolder.performTreeBuild(_:) (in IDESourceControlUI)46 thunk for @escaping @callee_guaranteed () -> () (in IDESourceControlUI)47 -[DVTModelGraphTransactionScope performTransaction:] (in DVTFoundation)48 closure #1 in SourceControlWorkingCopyHolder.performTreeBuild(_:) (in IDESourceControlUI)49 thunk for @escaping @callee_guaranteed () -> () (in DVTFoundation)50 ___DVTCachedTimeSlicedMainThreadBlockProcessingQueueForKey_block_invoke_2 (in DVTFoundation)51 -[_DVTTimeSlicedMainThreadUnorderedNonUniquingWorkQueue _processWorkItemsWithDeadline:] (in DVTFoundation)52 -[DVTTimeSlicedMainThreadWorkQueue _processWithDeadline:] (in DVTFoundation)53 -[_DVTTimeSlicedMainThreadActiveWorkQueues _processWorkQueuesOnDeadline] (in DVTFoundation)54 __NSFireDelayedPerform (in Foundation)55 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation)56 __CFRunLoopDoTimer (in CoreFoundation)57 __CFRunLoopDoTimers (in CoreFoundation)58 __CFRunLoopRun (in CoreFoundation)59 CFRunLoopRunSpecific (in CoreFoundation)60 RunCurrentEventLoopInMode (in HIToolbox)61 ReceiveNextEventCommon (in HIToolbox)62 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox)63 _DPSNextEvent (in AppKit)64 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit)65 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit)66 -[NSApplication run] (in AppKit)67 NSApplicationMain (in AppKit)68 main (in Xcode)69 start (in libdyld.dylib)abort() calledApplication Specific Signatures:invalidatableObject.valid```