iOS Xcode -Editing Storyboard Objects Results In V

Question

I'm working on Sierra version 10.12.6 and Xcode 8.3, I have 3 scenes in Storyboard that are all connected to one another via push segues.

The 1st scene has a tableView and a cell with an imageView and 2 labels.

The 2nd scene has a tableView and a cell with an imageView and 4 labels.

The 3rd scenes has a tableView with a cell that contains 3 labels and a collectionView with a cell that has an imageView.

When I try to make adjustments to the 3rd scene the 1st and 2nd scene automatically updates to match the same exact elements that are on the 3rd scene and then Xcode crashes.

The problem only happens when I try to make adjustments to the 3rd scene.

On the 3rd scene I tried to disconnect all the objects from it's view controller and then make the adjustments but the 1st and 2nd scene still duplicates everything, Xcode crashes and when it reopens all of the connections are still alive (as if I never disconnected them).

I then disconnected the segues between the scenes but the same exact problem occurs -once I make an adjustment to the 3rd scene the other two scenes update to match and then there is a crash.

After the crash once I open the project everything is back to normal.

The 3rd scene is the all the way to the right and has pink inside of it:

Before I make an adjustment on the 3rd scene:

After I make an adjustment to the 3rd scene:

I tried cleaning the project with a deep clean, a regular clean, deleting derived data, completely uninstalled Xcode then reinstalled it again but the problem still occurs.

Why are the other 2 scenes automatically updating to match the 3rd scene?

Here are the crash logs:

Process: Xcode [84727] Path:
/Applications/Xcode.app/Contents/MacOS/Xcode Identifier:
com.apple.dt.Xcode Version: 8.3 (12169) Build Info:
IDEFrameworks-12169000000000000~2 Code Type: X86-64 (Native) Parent Process: ??? 1 Responsible: Xcode [84727] User ID: 501

Date/Time: 2017-08-01 10:01:54.643 -0400 OS Version:
Mac OS X 10.12.6 (16G29) Report Version: 12 Anonymous UUID:
20134940-2FA2-50E1-5E8E-640EC65140FA

Sleep/Wake UUID: 3E6A13DD-A904-4D70-8D26-BA158BDA1C5E

Time Awake Since Boot: 190000 seconds Time Since Wake: 6500 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: 8E162 ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-12086/InterfaceBuilder/Autolayout/IBCocoaTouchAutolayoutArbitrationUnit.m:259

Details: A method claimed to have failed but provided no error!

Object: Method: -engineEvaluatedConstantValuesOfConstraints:error: Thread:
{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 -[IBCocoaTouchAutolayoutArbitrationUnit engineEvaluatedConstantValuesOfConstraints:error:] (in IDEInterfaceBuilderCocoaTouchIntegration) 4
__IBEnumerateEngineEvaluatedConstantsForConstraintsWithBlockAndFallbackBlock_block_invoke (in IDEInterfaceBuilderKit) 5 __NSDictionaryEnumerate (in CoreFoundation) 6
IBEnumerateEngineEvaluatedConstantsForConstraintsWithBlockAndFallbackBlock (in IDEInterfaceBuilderKit) 7 -[IBViewEditor _populateEngineEvaluatedConstantsByConstraint:andPopulateConstraintsByAbstraction:forDrawingConstraintAbstractions:] (in IDEInterfaceBuilderKit) 8 -[IBViewEditor updateConstraintDrawablesAndGuideLinesForOrderedConstraintAbstractions:] (in IDEInterfaceBuilderKit) 9 -[IBViewEditor pushOrderedConstraintAbstractionsToDraw:] (in IDEInterfaceBuilderKit) 10 -[IBViewEditor updateConstraintsForViews] (in IDEInterfaceBuilderKit) 11 -[IBViewEditor updateConstraintVisibilityBasedUponSelection] (in IDEInterfaceBuilderKit) 12 -[IBViewEditor selectionOwner:didSelect:andDeselect:] (in IDEInterfaceBuilderKit) 13 -[IBSelectionOwner didSelect:andDeselect:] (in IDEInterfaceBuilderKit) 14 -[IBSelectionOwner primitiveUpdateSelection:] (in IDEInterfaceBuilderKit) 15 -[IBSelectionOwner selectObjects:byExtending:andToggling:] (in IDEInterfaceBuilderKit) 16 -[IBCanvasViewController selectObjectsInEditor:scrollSettings:] (in IDEInterfaceBuilderKit) 17 -[IBEditorCanvasFrameController dragTarget:didAcceptDraggedObjects:fromDragInfo:context:] (in IDEInterfaceBuilderKit) 18 -[IBEditorCanvasFrameController performDragOperation:] (in IDEInterfaceBuilderKit) 19
-[IBEditorCanvasFrame performDragOperation:] (in IDEInterfaceBuilderKit) 20 DVTTrackDragging (in DVTKit) 21
-[DVTDragManager dragImage:at:mouseDownEvent:pasteboard:allowedOperations:source:slideBack:draggingSourceContext:] (in DVTKit) 22 -[DVTDragManager dragImage:at:offset:mouseDownEvent:mouseDraggedEvent:pasteboard:allowedOperations:source:slideBack:draggingSourceContext:] (in DVTKit) 23 __151-[IBEditorCanvasFrameController dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:editor:draggingSourceContext:]_block_invoke (in IDEInterfaceBuilderKit) 24 -[IBDocument disableSavingWithError:whileRunningBlock:] (in IDEInterfaceBuilderKit) 25 -[IBEditorCanvasFrameController dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:editor:draggingSourceContext:] (in IDEInterfaceBuilderKit) 26 -[IBViewEditorCanvasFrameController dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:editor:draggingSourceContext:] (in IDEInterfaceBuilderKit) 27 __113-[IBEditor dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:dragContext:]_block_invoke (in IDEInterfaceBuilderKit) 28 -[IBDocumentAutolayoutManager delayAutolayoutStatusUpdatingDuring:] (in IDEInterfaceBuilderKit) 29 -[IBDocument delayAutolayoutStatusUpdatingDuring:] (in IDEInterfaceBuilderKit) 30 -[IBEditor dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:dragContext:] (in IDEInterfaceBuilderKit) 31 -[IBUITableViewCellContentViewEditor dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:dragContext:] (in IDEInterfaceBuilderCocoaTouchIntegration) 32 __61-[IBViewEditor dragChildViews:withMouseDown:andMouseDragged:]_block_invoke (in IDEInterfaceBuilderKit) 33 -[IBViewEditor drawBordersOnDraggedViewsWhilePerformingBlock:] (in IDEInterfaceBuilderKit) 34 -[IBViewEditor dragChildViews:withMouseDown:andMouseDragged:] (in IDEInterfaceBuilderKit) 35 -[IBViewEditor dragSelectedViewsWithMouseDown:andMouseDragged:] (in IDEInterfaceBuilderKit) 36 -[IBViewEditor interceptMouseDragged:] (in IDEInterfaceBuilderKit) 37 -[IBViewEditor interceptEvent:] (in IDEInterfaceBuilderKit) 38 -[IBEditorCanvasFrameController sendEvent:] (in IDEInterfaceBuilderKit) 39
-[IBViewEditorCanvasFrameController sendEvent:] (in IDEInterfaceBuilderKit) 40 -[IBEditorCanvasFrame mouseDragged:] (in IDEInterfaceBuilderKit) 41 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] (in AppKit) 42 -[NSWindow(NSEventRouting) sendEvent:] (in AppKit) 43 -[IDEWorkspaceWindow sendEvent:] (in IDEKit) 44 -[NSApplication(NSEvent) sendEvent:] (in AppKit) 45 -[IDEApplication sendEvent:] (in IDEKit) 46 -[NSApplication run] (in AppKit) 47 NSApplicationMain (in AppKit) 48 start (in libdyld.dylib) abort() called

Application Specific Signatures: __localError

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0
libsystem_kernel.dylib 0x0000000111cf2d42 __pthread_kill + 10 1 libsystem_pthread.dylib 0x0000000111dc8457 pthread_kill + 90 2 libsystem_c.dylib 0x00007fffc8149420 abort + 129 3 com.apple.dt.IDEKit 0x000000010fd1c1de +[IDEAssertionHandler _handleAssertionWithLogString:assertionSignature:assertionReason:extraBacktrace:] + 1378 4 com.apple.dt.IDEKit 0x000000010fd1c864 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] + 1175 5 com.apple.dt.DVTFoundation 0x000000010e619a8c _DVTAssertionHandler + 375 6 com.apple.dt.DVTFoundation 0x000000010e619d1d _DVTAssertionFailureHandler + 369 7
com.apple.dt.IDE.IDEInterfaceBuilderCocoaTouchIntegration 0x0000000125297bdb -[IBCocoaTouchAutolayoutArbitrationUnit engineEvaluatedConstantValuesOfConstraints:error:] + 1175 8
com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001238e4f50 __IBEnumerateEngineEvaluatedConstantsForConstraintsWithBlockAndFallbackBlock_block_invoke + 557 9 com.apple.CoreFoundation 0x00007fffb237f7ec __NSDictionaryEnumerate + 844 10 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001238e4a1c IBEnumerateEngineEvaluatedConstantsForConstraintsWithBlockAndFallbackBlock + 688 11 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ab8017 -[IBViewEditor _populateEngineEvaluatedConstantsByConstraint:andPopulateConstraintsByAbstraction:forDrawingConstraintAbstractions:] + 393 12 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ab8530 -[IBViewEditor updateConstraintDrawablesAndGuideLinesForOrderedConstraintAbstractions:] + 339 13 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ab9d4d -[IBViewEditor pushOrderedConstraintAbstractionsToDraw:] + 371 14 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123aba891 -[IBViewEditor updateConstraintsForViews] + 2475 15 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123abb77d -[IBViewEditor updateConstraintVisibilityBasedUponSelection] + 2620 16 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123aa7657 -[IBViewEditor selectionOwner:didSelect:andDeselect:] + 227 17 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001239ea5a7 -[IBSelectionOwner didSelect:andDeselect:] + 172 18 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001239ea7b9 -[IBSelectionOwner primitiveUpdateSelection:] + 487 19 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001239ea8c9 -[IBSelectionOwner selectObjects:byExtending:andToggling:] + 67 20 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x000000012371718c -[IBCanvasViewController selectObjectsInEditor:scrollSettings:] + 3419 21 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123854715 -[IBEditorCanvasFrameController dragTarget:didAcceptDraggedObjects:fromDragInfo:context:] + 542 22 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123854a74 -[IBEditorCanvasFrameController performDragOperation:] + 282 23 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001238481ed -[IBEditorCanvasFrame performDragOperation:] + 79 24 com.apple.dt.DVTKit 0x000000010ec83772 DVTTrackDragging + 12343 25 com.apple.dt.DVTKit 0x000000010ec806ce -[DVTDragManager dragImage:at:mouseDownEvent:pasteboard:allowedOperations:source:slideBack:draggingSourceContext:] + 150 26 com.apple.dt.DVTKit 0x000000010ec84798 -[DVTDragManager dragImage:at:offset:mouseDownEvent:mouseDraggedEvent:pasteboard:allowedOperations:source:slideBack:draggingSourceContext:] + 138 27 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x000000012384c7a7 __151-[IBEditorCanvasFrameController dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:editor:draggingSourceContext:]_block_invoke + 114 28 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123797604 -[IBDocument disableSavingWithError:whileRunningBlock:] + 107 29 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x000000012384c5d6 -[IBEditorCanvasFrameController dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:editor:draggingSourceContext:] + 693 30 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ac5825 -[IBViewEditorCanvasFrameController dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:editor:draggingSourceContext:] + 219 31 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x000000012383f622 __113-[IBEditor dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:dragContext:]_block_invoke + 844 32 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001237f80ee -[IBDocumentAutolayoutManager delayAutolayoutStatusUpdatingDuring:] + 31 33 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x00000001237e151e -[IBDocument delayAutolayoutStatusUpdatingDuring:] + 79 34 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x000000012383f183 -[IBEditor dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:dragContext:] + 432 35 com.apple.dt.IDE.IDEInterfaceBuilderCocoaTouchIntegration 0x00000001253d71d9 -[IBUITableViewCellContentViewEditor dragObjects:withImage:inMouseDownEvent:mouseDraggedEvent:imageLocation:allowedOperations:dragContext:] + 341 36 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123aa9988 __61-[IBViewEditor dragChildViews:withMouseDown:andMouseDragged:]_block_invoke + 109 37 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123aa8f84 -[IBViewEditor drawBordersOnDraggedViewsWhilePerformingBlock:] + 28 38 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123aa94a7 -[IBViewEditor dragChildViews:withMouseDown:andMouseDragged:] + 1168 39 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123aa8fee -[IBViewEditor dragSelectedViewsWithMouseDown:andMouseDragged:] + 96 40 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ab2fcf -[IBViewEditor interceptMouseDragged:] + 842 41 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ab386e -[IBViewEditor interceptEvent:] + 634 42 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x000000012385b86e -[IBEditorCanvasFrameController sendEvent:] + 1826 43 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123ac5734 -[IBViewEditorCanvasFrameController sendEvent:] + 349 44 com.apple.dt.IDE.IDEInterfaceBuilderKit 0x0000000123846723 -[IBEditorCanvasFrame mouseDragged:] + 79 45 com.apple.AppKit 0x00007fffb07713ca -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 4340 46 com.apple.AppKit 0x00007fffb076ff0a -[NSWindow(NSEventRouting) sendEvent:] + 541 47 com.apple.dt.IDEKit 0x000000010fd61e58 -[IDEWorkspaceWindow sendEvent:] + 154 48 com.apple.AppKit
0x00007fffb05f4681 -[NSApplication(NSEvent) sendEvent:] + 1145 49 com.apple.dt.IDEKit 0x000000010fdab177 -[IDEApplication sendEvent:] + 926 50 com.apple.AppKit
0x00007fffafe6f427 -[NSApplication run] + 1002 51 com.apple.AppKit
0x00007fffafe39e0e NSApplicationMain + 1237 52 libdyld.dylib
0x0000000111c9a235 start + 1

Thread 1: 0 libsystem_kernel.dylib 0x0000000111ceb34a mach_msg_trap + 10 1 libsystem_kernel.dylib
0x0000000111cea797 mach_msg + 55 2 com.apple.CoreFoundation
0x00007fffb2382874 CFRunLoopServiceMachPort + 212 3
com.apple.CoreFoundation 0x00007fffb2381cf1 __CFRunLoopRun + 1361 4 com.apple.CoreFoundation 0x00007fffb2381544 CFRunLoopRunSpecific + 420 5 com.apple.Foundation
0x00007fffb3db2252 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 277 6 com.apple.DTDeviceKitBase 0x000000011bc6b143 +[DTDKRemoteDeviceConnection startServiceBrowsers] + 217 7 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 8 libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 9 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 10 libsystem_pthread.dylib
0x0000000111dc508d thread_start + 13

Thread 2: 0 libsystem_kernel.dylib 0x0000000111ceb34a mach_msg_trap + 10 1 libsystem_kernel.dylib
0x0000000111cea797 mach_msg + 55 2 com.apple.CoreFoundation
0x00007fffb2382874 CFRunLoopServiceMachPort + 212 3
com.apple.CoreFoundation 0x00007fffb2381cf1 __CFRunLoopRun + 1361 4 com.apple.CoreFoundation 0x00007fffb2381544 CFRunLoopRunSpecific + 420 5 com.apple.Foundation
0x00007fffb3db2252 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 277 6 com.apple.DTDeviceKitBase 0x000000011bc79df1 -[DTDKRemoteDeviceDataListener listenerThreadImplementation] + 1454 7 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 8 libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 9 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 10 libsystem_pthread.dylib
0x0000000111dc508d thread_start + 13

Thread 3:: com.apple.CFSocket.private 0 libsystem_kernel.dylib
0x0000000111cf2eb6 __select + 10 1 com.apple.CoreFoundation
0x00007fffb23bd939 __CFSocketManager + 729 2
libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 3 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 4 libsystem_pthread.dylib 0x0000000111dc508d thread_start + 13

Thread 4: 0 libsystem_kernel.dylib 0x0000000111cf2bf2 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x0000000111dc67fa _pthread_cond_wait + 712 2 libc++.1.dylib
0x00007fffc6c514cd std::__1::condition_variable::wait(std::__1::unique_lock&) + 47 3 com.apple.JavaScriptCore 0x00007fffb53b043c void std::__1::condition_variable_any::wait >(std::__1::unique_lock&) + 108 4 com.apple.JavaScriptCore 0x00007fffb53b03bb bmalloc::AsyncTask::threadRunLoop() + 155 5
com.apple.JavaScriptCore 0x00007fffb53b028d bmalloc::AsyncTask::threadEntryPoint(bmalloc::AsyncTask) + 29 6 com.apple.JavaScriptCore
0x00007fffb53b053d void std::__1::__thread_proxy*), bmalloc::AsyncTask*>

(void*) + 93 7 libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 8 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 9 libsystem_pthread.dylib
0x0000000111dc508d thread_start + 13

Thread 5:: com.apple.NSURLConnectionLoader 0 libsystem_kernel.dylib 0x0000000111ceb34a mach_msg_trap + 10 1 libsystem_kernel.dylib
0x0000000111cea797 mach_msg + 55 2 com.apple.CoreFoundation
0x00007fffb2382874 CFRunLoopServiceMachPort + 212 3
com.apple.CoreFoundation 0x00007fffb2381cf1 __CFRunLoopRun + 1361 4 com.apple.CoreFoundation 0x00007fffb2381544 CFRunLoopRunSpecific + 420 5 com.apple.CFNetwork
0x000000011152a734 +[NSURLConnection(Loader) _resourceLoadLoop:] + 313 6 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 7 libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 8 libsystem_pthread.dylib
0x0000000111dc5887 _pthread_start + 286 9 libsystem_pthread.dylib
0x0000000111dc508d thread_start + 13

Thread 6:: com.apple.NSEventThread 0 libsystem_kernel.dylib
0x0000000111ceb34a mach_msg_trap + 10 1 libsystem_kernel.dylib
0x0000000111cea797 mach_msg + 55 2 com.apple.CoreFoundation
0x00007fffb2382874 __CFRunLoopServiceMachPort + 212 3
com.apple.CoreFoundation 0x00007fffb2381cf1 __CFRunLoopRun + 1361 4 com.apple.CoreFoundation 0x00007fffb2381544 CFRunLoopRunSpecific + 420 5 com.apple.AppKit
0x00007fffaffc7f02 _NSEventThread + 205 6 libsystem_pthread.dylib
0x0000000111dc593b _pthread_body + 180 7 libsystem_pthread.dylib
0x0000000111dc5887 _pthread_start + 286 8 libsystem_pthread.dylib
0x0000000111dc508d thread_start + 13

Thread 7:: DYMobileDeviceManager 0 libsystem_kernel.dylib
0x0000000111ceb34a mach_msg_trap + 10 1 libsystem_kernel.dylib
0x0000000111cea797 mach_msg + 55 2 com.apple.CoreFoundation
0x00007fffb2382874 CFRunLoopServiceMachPort + 212 3
com.apple.CoreFoundation 0x00007fffb2381cf1 __CFRunLoopRun + 1361 4 com.apple.CoreFoundation 0x00007fffb2381544 CFRunLoopRunSpecific + 420 5 com.apple.Foundation
0x00007fffb3db2252 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 277 6 com.apple.Foundation 0x00007fffb3db212a -[NSRunLoop(NSRunLoop) run] + 76 7 com.apple.GPUToolsMobileFoundation 0x00000001272f525d -[DYMobileDeviceManager _deviceNotificationThread:] + 134 8 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 9 libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 10 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 11 libsystem_pthread.dylib
0x0000000111dc508d thread_start + 13

Thread 8: 0 libsystem_pthread.dylib 0x0000000111dc5070 start_wqthread + 0 1 ???
0x000070000c38db80 0 + 123145507363712

Thread 9: 0 libsystem_kernel.dylib 0x0000000111cf2bf2 psynch_cvwait + 10 1 libsystem_pthread.dylib 0x0000000111dc67fa _pthread_cond_wait + 712 2
com.apple.Xcode.DevToolsCore 0x0000000120ef3822 -[XCBlockQueue _processBlocksInThreadSlotNumber:] + 594 3 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 4
libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 5 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 6 libsystem_pthread.dylib 0x0000000111dc508d thread_start + 13

Thread 10: 0 libsystem_kernel.dylib 0x0000000111cf2bf2 psynch_cvwait + 10 1 libsystem_pthread.dylib 0x0000000111dc67fa _pthread_cond_wait + 712 2
com.apple.Xcode.DevToolsCore 0x0000000120ef3822 -[XCBlockQueue _processBlocksInThreadSlotNumber:] + 594 3 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 4
libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 5 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 6 libsystem_pthread.dylib 0x0000000111dc508d thread_start + 13

Thread 11: 0 libsystem_kernel.dylib 0x0000000111cf2bf2 psynch_cvwait + 10 1 libsystem_pthread.dylib 0x0000000111dc67fa _pthread_cond_wait + 712 2
com.apple.Xcode.DevToolsCore 0x0000000120ef3822 -[XCBlockQueue _processBlocksInThreadSlotNumber:] + 594 3 com.apple.Foundation 0x00007fffb3dc28ad __NSThread__start + 1243 4
libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 5 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 6 libsystem_pthread.dylib 0x0000000111dc508d thread_start + 13

Thread 12: 0 libsystem_pthread.dylib 0x0000000111dc5070 start_wqthread + 0 1 ???
0x0000000000000010 0 + 16

Thread 13: 0 libsystem_kernel.dylib 0x0000000111cf344e __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x0000000111dc548e _pthread_wqthread + 1023 2
libsystem_pthread.dylib 0x0000000111dc507d start_wqthread + 13

Thread 14: 0 libsystem_pthread.dylib 0x0000000111dc5070 start_wqthread + 0 1 ???
0x00007fc08b23c020 0 + 140464944824352

Thread 15: 0 libsystem_kernel.dylib 0x0000000111cf344e __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x0000000111dc548e _pthread_wqthread + 1023 2
libsystem_pthread.dylib 0x0000000111dc507d start_wqthread + 13

Thread 16: 0 libsystem_kernel.dylib 0x0000000111cf2f46 __semwait_signal + 10 1 libsystem_c.dylib 0x00007fffc816ab72 nanosleep + 199 2 com.apple.CoreSymbolication
0x00007fffbe4f62ed cleaner_thread_main(void*) + 42 3
libsystem_pthread.dylib 0x0000000111dc593b _pthread_body + 180 4 libsystem_pthread.dylib 0x0000000111dc5887 _pthread_start + 286 5 libsystem_pthread.dylib 0x0000000111dc508d thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x0000000000000006 rcx: 0x00007fff51855448 rdx: 0x0000000000000000 rdi: 0x0000000000000307 rsi: 0x0000000000000006 rbp: 0x00007fff51855470 rsp: 0x00007fff51855448
r8: 0x00007fc09a5058e0 r9: 0x0000000110411897 r10: 0x0000000008000000 r11: 0x0000000000000206 r12: 0x00007fffc77c8410 r13: 0x0000000000000000 r14: 0x0000000111dcd3c0 r15: 0x00007fc0a096d640 rip: 0x0000000111cf2d42 rfl: 0x0000000000000206 cr2: 0x00007fffd1019128 Logical CPU: 0 Error Code:
0x02000148 Trap Number: 133

Answer 1

Xcode is crashing because of the the IBCocoaTouchAutolayoutArbitrationUnit.m file in your library/caches folder. According to this link, you can just delete the files in your library/caches folder (don't delete the folder itself) and you should be fine. That should fix the problem. But to play it on the safe side, you probably should move this file to another location instead of deleting. Also try opening your workspace in Xcode 9 beta to see if it crashes the same way with the same error message.