After few seconds from start:
MacBook:~ khodakov$ /Applications/Xcode.app/Contents/MacOS/Xcode ; exit;
2017-05-14 18:28:56.432 Xcode[1672:26926] Unknown class GPUTesselationSliderCell in Interface Builder file.
2017-05-14 18:28:56.725 Xcode[1672:26926] Unknown class GPUTesselationSliderCell in Interface Builder file.
2017-05-14 18:28:56.942 Xcode[1672:26926] Unknown class GPUTesselationSliderCell in Interface Builder file.
2017-05-14 18:28:57.249 Xcode[1672:26926] Unknown class GPUTesselationSliderCell in Interface Builder file.
2017-05-14 18:28:57.572 Xcode[1672:26926] Unknown class GPUTesselationSliderCell in Interface Builder file.
2017-05-14 18:28:58.924 Xcode[1672:26926] Failed to connect (canvasView) outlet from (IBCanvasScrollView) to (IBStoryboardCanvasView): missing setter or instance variable
2017-05-14 18:29:03.594 Xcode[1672:26926] [MT] DVTAssertions: ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEInterfaceBuilder/IDEInterfaceBuilder-12120/InterfaceBuilderKit/Document/IBDocument.m:7256
Details: (_upgradeDocumentAlert) should be nil, but it is <NSAlert: 0x7f907d4df7c0>
Object: <IBStoryboardDocument: 0x7f9075903c00>
Method: -attemptToUpdateToLatestFormatIfNeededFromInitiatingWindow:
Thread: <NSThread: 0x7f9075600120>{number = 1, name = main}
Hints:
2017-05-14 18:29:03.606 Xcode[1672:26926] [MT] DVTAssertions:
Backtrace:
0 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit)
1 _DVTAssertionHandler (in DVTFoundation)
2 _DVTAssertionFailureHandler (in DVTFoundation)
3 -[IBDocument attemptToUpdateToLatestFormatIfNeededFromInitiatingWindow:] (in IDEInterfaceBuilderKit)
4 -[IBAbstractDocumentEditor upgradeDocumentOrPresentOptionToUser] (in IDEInterfaceBuilderKit)
5 -[IBAbstractDocumentEditor didLoadEditor] (in IDEInterfaceBuilderKit)
6 __44-[IBAbstractDocumentEditor fadeOutLoadingUI]_block_invoke.2088 (in IDEInterfaceBuilderKit)
7 _dispatch_call_block_and_release (in libdispatch.dylib)
8 _dispatch_client_callout (in libdispatch.dylib)
9 _dispatch_main_queue_callback_4CF (in libdispatch.dylib)
10 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ (in CoreFoundation)
11 __CFRunLoopRun (in CoreFoundation)
12 CFRunLoopRunSpecific (in CoreFoundation)
13 RunCurrentEventLoopInMode (in HIToolbox)
14 ReceiveNextEventCommon (in HIToolbox)
15 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox)
16 _DPSNextEvent (in AppKit)
17 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit)
18 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit)
19 -[NSApplication run] (in AppKit)
20 NSApplicationMain (in AppKit)
21 start (in libdyld.dylib)
Abort trap: 6
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