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Running Mojave 10.14.6 on a new MacBook ProXcode 11 beta 7 hangs when saving a .playground. All the time. I've deleted and re-installed Xcode and the entire /Library/Developer directory, reset the path with xcode-select -r, and reinstalled Xcode Command Line Tools. Many times.A typical Crash Log top looks like this:Date/Time: 2019-09-07 22:03:05 -0700 End time: 2019-09-07 22:03:07 -0700 OS Version: Mac OS X 10.14.6 (Build 18G95) Architecture: x86_64h Report Version: 28 Data Source: Stackshots Shared Cache: 0x1094f000 D6BF345B-E109-37E2-A559-BF6F0E76564C Command: Xcode Path: /Users/USER/Downloads/Xcode-beta.app/Contents/MacOS/Xcode Version: ??? (???) Parent: launchd [1] PID: 29477 Event: hang Duration: 2.89s (process was unresponsive for 56 seconds before sampling) Steps: 29 (100ms sampling interval) Hardware model: MacBookPro15,1 Active cpus: 16 Time Awake Since Boot: 400000s Time Since Wake: 210s -------------------------------------------------- Timeline format: stacks are sorted chronologically Use -i and -heavy to re-report with count sorting -------------------------------------------------- Heaviest stack for the main thread of the target process: 29 start + 1 (libdyld.dylib + 91093) [0x7fff682643d5] 29 main + 541 (Xcode + 8205) [0x10312f00d] 29 NSApplicationMain + 777 (AppKit + 10984) [0x7fff398e0ae8] 29 -[NSApplication run] + 699 (AppKit + 79272) [0x7fff398f15a8] 29 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 390 (DVTKit + 90363) [0x103a5a0fb] 29 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1361 (AppKit + 103563) [0x7fff398f748b] 29 _DPSNextEvent + 1135 (AppKit + 108445) [0x7fff398f879d] 29 _BlockUntilNextEventMatchingListInModeWithFilter + 64 (HIToolbox + 44150) [0x7fff3b55fc76] 29 ReceiveNextEventCommon + 603 (HIToolbox + 44773) [0x7fff3b55fee5] 29 RunCurrentEventLoopInMode + 292 (HIToolbox + 45483) [0x7fff3b5601ab] 29 CFRunLoopRunSpecific + 455 (CoreFoundation + 237246) [0x7fff3c300ebe] 29 __CFRunLoopRun + 2772 (CoreFoundation + 240612) [0x7fff3c301be4] 29 __CFRunLoopDoBlocks + 394 (CoreFoundation + 241287) [0x7fff3c301e87] 29 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12 (CoreFoundation + 489316) [0x7fff3c33e764] 29 ___NSMainRunLoopPerformBlockInModes_block_invoke + 25 (AppKit + 6318132) [0x7fff39ee4834] 29 __62-[NSDocumentController(NSInternal) _onMainThreadInvokeWorker:]_block_invoke_3 + 152 (AppKit + 6307961) [0x7fff39ee2079] 29 ??? (IDEKit + 1804770) [0x104eab9e2] 29 __119-[NSDocument(NSDocumentSaving) _fileCoordinator:asynchronouslyCoordinateReadingContentsAndWritingItemAtURL:byAccessor:]_block_invoke_2 + 89 (AppKit + 11931980) [0x7fff3a43f14c] 29 ??? (IDEKit + 1803843) [0x104eab643] 29 -[NSDocument(NSDocumentSerializationAPIs) continueFileAccessUsingBlock:] + 237 (AppKit + 6794157) [0x7fff39f58bad] 29 ??? (IDEKit + 1804175) [0x104eab78f] 29 __85-[NSDocument(NSDocumentSaving) _saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke_3.815 + 1902 (AppKit + 11941726) [0x7fff3a44175e] 29 __85-[NSDocument(NSDocumentSaving) _saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke.908 + 440 (AppKit + 11947776) [0x7fff3a442f00] 29 __85-[NSDocument(NSDocumentSaving) _saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke_2.911 + 231 (AppKit + 11948022) [0x7fff3a442ff6] 29 ??? (IDEKit + 1821420) [0x104eafaec] 29 -[NSDocument(NSDocumentSaving) _writeSafelyToURL:ofType:forSaveOperation:error:] + 28 (AppKit + 11911858) [0x7fff3a43a2b2] 29 -[NSDocument(NSDocumentSaving) _writeSafelyToURL:ofType:forSaveOperation:forceTemporaryDirectory:error:] + 850 (AppKit + 11908562) [0x7fff3a4395d2] 29 ??? (IDEPegasusPlaygroundEditor + 311569) [0x12b0e7111] 29 ??? (IDEPegasusPlaygroundEditor + 462040) [0x12b10bcd8] 29 -[NSDocument writeToURL:ofType:forSaveOperation:originalContentsURL:error:] + 444 (AppKit + 4572826) [0x7fff39d3a69a] 29 -[NSDocument writeToURL:ofType:error:] + 401 (AppKit + 4573303) [0x7fff39d3a877] 29 ??? (IDEPegasusPlaygroundEditor + 311809) [0x12b0e7201] 29 ??? (IDEPegasusPlaygroundEditor + 464565) [0x12b10c6b5] 29 ??? (IDEPegasusPlaygroundEditor + 311039) [0x12b0e6eff] 29 ??? (IDEFoundation + 3065349) [0x104007605] 29 ??? (DVTFoundation + 1074371) [0x1032954c3] 29 ??? (DVTFoundation + 2719464) [0x103426ee8] 29 ??? (DVTFoundation + 2886336) [0x10344fac0] 29 _dispatch_lane_barrier_sync_invoke_and_complete + 60 (libdispatch.dylib + 61737) [0x7fff68223129] 29 _dispatch_client_callout + 8 (libdispatch.dylib + 13885) [0x7fff6821763d] 29 ??? (DVTFoundation + 1074943) [0x1032956ff] 29 ??? (DVTFoundation + 1287265) [0x1032c9461] 29 ??? (DVTFoundation + 2938754) [0x10345c782] 29 ??? (DVTFoundation + 2936145) [0x10345bd51] 29 ??? (DVTFoundation + 2933205) [0x10345b1d5] 29 ??? (IDESwiftPackageSupport + 191186) [0x129088ad2] 29 ??? (IDESwiftPackageSupport + 191684) [0x129088cc4] 29 ??? (DVTFoundation + 2938754) [0x10345c782] 29 ??? (DVTFoundation + 2936145) [0x10345bd51] 29 ??? (DVTFoundation + 2933205) [0x10345b1d5] 29 ??? (IDESwiftPackageSupport + 537778) [0x1290dd4b2] 29 ??? (IDESwiftPackageSupport + 538299) [0x1290dd6bb] 29 ??? (DVTFoundation + 1066103) [0x103293477] 29 -[NSFileCoordinator coordinateReadingItemAtURL:options:error:byAccessor:] + 77 (Foundation + 825513) [0x7fff3e6128a9] 29 -[NSFileCoordinator(NSPrivate) _coordinateReadingItemAtURL:options:error:byAccessor:] + 689 (Foundation + 826208) [0x7fff3e612b60] 29 -[NSFileCoordinator(NSPrivate) _blockOnAccessClaim:withAccessArbiter:] + 377 (Foundation + 827942) [0x7fff3e613226] 29 _dispatch_semaphore_wait_slow + 98 (libdispatch.dylib + 17311) [0x7fff6821839f] 29 semaphore_wait_trap + 10 (libsystem_kernel.dylib + 4710) [0x7fff68399266] *29 semaphore_wait_continue + 0 (kernel + 1935040) [0xffffff80003d86c0] Process: Xcode [29477] UUID: 2304E81B-2EB2-3DE7-A271-C9E07E683F61 Path: /Users/USER/Downloads/Xcode-beta.app/Contents/MacOS/Xcode Architecture: x86_64 Parent: launchd [1] UID: 501 Sudden Term: Tracked Footprint: 251.61 MB Start time: 2019-09-07 22:03:05 -0700 End time: 2019-09-07 22:03:07 -0700 Num samples: 29 (1-29) CPU Time: 0.020s (33.9M cycles, 14.6M instructions, 2.32c/i) Note: Unresponsive for 56 seconds before sampling Note: 2 idle work queue threads omitted Thread 0x4d2ed6 DispatchQueue 109 29 samples (1-29) priority 47 (base 47) 29 start + 1 (libdyld.dylib + 91093) [0x7fff682643d5] 1-29 29 main + 541 (Xcode + 8205) [0x10312f00d] 1-29 29 NSApplicationMain + 777 (AppKit + 10984) [0x7fff398e0ae8] 1-29 29 -[NSApplication run] + 699 (AppKit + 79272) [0x7fff398f15a8] 1-29 29 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 390 (DVTKit + 90363) [0x103a5a0fb] 1-29 29 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1361 (AppKit + 103563) [0x7fff398f748b] 1-29 29 _DPSNextEvent + 1135 (AppKit + 108445) [0x7fff398f879d] 1-29 29 _BlockUntilNextEventMatchingListInModeWithFilter + 64 (HIToolbox + 44150) [0x7fff3b55fc76] 1-29 29 ReceiveNextEventCommon + 603 (HIToolbox + 44773) [0x7fff3b55fee5] 1-29 29 RunCurrentEventLoopInMode + 292 (HIToolbox + 45483) [0x7fff3b5601ab] 1-29 29 CFRunLoopRunSpecific + 455 (CoreFoundation + 237246) [0x7fff3c300ebe] 1-29 29 __CFRunLoopRun + 2772 (CoreFoundation + 240612) [0x7fff3c301be4] 1-29 29 __CFRunLoopDoBlocks + 394 (CoreFoundation + 241287) [0x7fff3c301e87] 1-29 29 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12 (CoreFoundation + 489316) [0x7fff3c33e764] 1-29 29 ___NSMainRunLoopPerformBlockInModes_block_invoke + 25 (AppKit + 6318132) [0x7fff39ee4834] 1-29 29 __62-[NSDocumentController(NSInternal) _onMainThreadInvokeWorker:]_block_invoke_3 + 152 (AppKit + 6307961) [0x7fff39ee2079] 1-29 29 ??? (IDEKit + 1804770) [0x104eab9e2] 1-29 29 __119-[NSDocument(NSDocumentSaving) _fileCoordinator:asynchronouslyCoordinateReadingContentsAndWritingItemAtURL:byAccessor:]_block_invoke_2 + 89 (AppKit + 11931980) [0x7fff3a43f14c] 1-29 29 ??? (IDEKit + 1803843) [0x104eab643] 1-29 29 -[NSDocument(NSDocumentSerializationAPIs) continueFileAccessUsingBlock:] + 237 (AppKit + 6794157) [0x7fff39f58bad] 1-29 29 ??? (IDEKit + 1804175) [0x104eab78f] 1-29 29 __85-[NSDocument(NSDocumentSaving) _saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke_3.815 + 1902 (AppKit + 11941726) [0x7fff3a44175e] 1-29 29 __85-[NSDocument(NSDocumentSaving) _saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke.908 + 440 (AppKit + 11947776) [0x7fff3a442f00] 1-29 29 __85-[NSDocument(NSDocumentSaving) _saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke_2.911 + 231 (AppKit + 11948022) [0x7fff3a442ff6] 1-29 29 ??? (IDEKit + 1821420) [0x104eafaec] 1-29 29 -[NSDocument(NSDocumentSaving) _writeSafelyToURL:ofType:forSaveOperation:error:] + 28 (AppKit + 11911858) [0x7fff3a43a2b2] 1-29 29 -[NSDocument(NSDocumentSaving) _writeSafelyToURL:ofType:forSaveOperation:forceTemporaryDirectory:error:] + 850 (AppKit + 11908562) [0x7fff3a4395d2] 1-29 29 ??? (IDEPegasusPlaygroundEditor + 311569) [0x12b0e7111] 1-29 29 ??? (IDEPegasusPlaygroundEditor + 462040) [0x12b10bcd8] 1-29 29 -[NSDocument writeToURL:ofType:forSaveOperation:originalContentsURL:error:] + 444 (AppKit + 4572826) [0x7fff39d3a69a] 1-29 29 -[NSDocument writeToURL:ofType:error:] + 401 (AppKit + 4573303) [0x7fff39d3a877] 1-29 29 ??? (IDEPegasusPlaygroundEditor + 311809) [0x12