title: There's problem with PDFKit appeared after update to Xcode 10.2. Is there any way to solve?
body: <p>The app crashes when I try to use pdfkit to display pdf-file. Here's the simple example​:</p>
  
  <pre><code>import UIKit
  import PDFKit
  
  class ViewController: UIViewController {
  
      @IBOutlet weak var pdfView: PDFView!
  
      override func viewDidLoad() {
          super.viewDidLoad()
          if let path = Bundle.main.path(forResource: "file", ofType: "pdf") {
              let url = URL(fileURLWithPath: path)
              if let pdfDocument = PDFDocument(url: url) {
                  pdfView.displayMode = .singlePageContinuous
                  pdfView.autoScales = true
                  // pdfView.displayDirection = .horizontal
                  pdfView.document = pdfDocument
              }
          }
      }
  }
  </code></pre>
  
  <p>This crashes with "uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan nan]'":</p>
  
  <pre><code>2019-03-26 21:09:47.837837+0400 pdfKitTest[3163:93151] libMobileGestalt MobileGestalt.c:890: MGIsDeviceOneOfType is not supported on this platform.
  2019-03-26 21:09:47.927078+0400 pdfKitTest[3163:93151] *** Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan nan]'
  *** First throw call stack:
  (
      0   CoreFoundation                      0x000000010e2326fb __exceptionPreprocess + 331
      1   libobjc.A.dylib                     0x000000010c8daac5 objc_exception_throw + 48
      2   CoreFoundation                      0x000000010e232555 +[NSException raise:format:] + 197
      3   QuartzCore                          0x00000001112d52ae _ZN2CA5Layer12set_positionERKNS_4Vec2IdEEb + 140
      4   QuartzCore                          0x00000001112c468b -[CALayer setPosition:] + 57
      5   QuartzCore                          0x00000001112c4de3 -[CALayer setFrame:] + 560
      6   PDFKit                              0x000000010c059097 -[PDFPageLayerTile initWithFrame:forPageLayer:withRenderingTransform:tileContentsScale:generationID:] + 168
      7   PDFKit                              0x000000010c05e805 -[PDFPageLayer _updateTiles] + 3439
      8   PDFKit                              0x000000010c059d8e -[PDFPageLayer setNeedsTilesUpdate] + 87
      9   PDFKit                              0x000000010c06e97d -[PDFPageView setNeedsTilesUpdate] + 48
      10  PDFKit                              0x000000010c070816 -[PDFPageView setFrame:] + 334
      11  PDFKit                              0x000000010c06711c -[PDFDocumentView createPageViewForPageAtIndex:] + 764
      12  PDFKit                              0x000000010c068326 -[PDFDocumentView updateVisibility] + 1726
      13  PDFKit                              0x000000010c0d776f -[PDFView resizeDisplayView:] + 517
      14  PDFKit                              0x000000010c0d0cdf -[PDFView layoutDocumentView] + 464
      15  PDFKit                              0x000000010c0cc36a -[PDFView setDocument:waitDuration:] + 1246
      16  pdfKitTest                          0x000000010bd277e2 $s10pdfKitTest14ViewControllerC11viewDidLoadyyF + 1506
      17  pdfKitTest                          0x000000010bd27924 $s10pdfKitTest14ViewControllerC11viewDidLoadyyFTo + 36
      18  UIKitCore                           0x0000000112fda43b -[UIViewController loadViewIfRequired] + 1183
      19  UIKitCore                           0x0000000112fda868 -[UIViewController view] + 27
      20  UIKitCore                           0x0000000113612c33 -[UIWindow addRootViewControllerViewIfPossible] + 122
      21  UIKitCore                           0x0000000113613327 -[UIWindow _setHidden:forced:] + 289
      22  UIKitCore                           0x0000000113625f86 -[UIWindow makeKeyAndVisible] + 42
      23  UIKitCore                           0x00000001135d5f1c -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4555
      24  UIKitCore                           0x00000001135db0c6 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1617
      25  UIKitCore                           0x0000000112e206d6 __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 904
      26  UIKitCore                           0x0000000112e28fce +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
      27  UIKitCore                           0x0000000112e202ec -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 236
      28  UIKitCore                           0x0000000112e20c48 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 1091
      29  UIKitCore                           0x0000000112e1efba __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 782
      30  UIKitCore                           0x0000000112e1ec71 -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 433
      31  UIKitCore                           0x0000000112e239b6 __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 576
      32  UIKitCore                           0x0000000112e24610 _performActionsWithDelayForTransitionContext + 100
      33  UIKitCore                           0x0000000112e2371d -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 223
      34  UIKitCore                           0x0000000112e286d0 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
      35  UIKitCore                           0x00000001135d99a8 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 514
      36  UIKitCore                           0x0000000113190dfa -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
      37  FrontBoardServices                  0x00000001194cd125 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 448
      38  FrontBoardServices                  0x00000001194d6ed6 __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 283
      39  FrontBoardServices                  0x00000001194d6700 __40-[FBSWorkspace _performDelegateCallOut:]_block_invoke + 53
      40  libdispatch.dylib                   0x000000010f5c5db5 _dispatch_client_callout + 8
      41  libdispatch.dylib                   0x000000010f5c92ba _dispatch_block_invoke_direct + 300
      42  FrontBoardServices                  0x0000000119508146 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30
      43  FrontBoardServices                  0x0000000119507dfe -[FBSSerialQueue _performNext] + 451
      44  FrontBoardServices                  0x0000000119508393 -[FBSSerialQueue _performNextFromRunLoopSource] + 42
      45  CoreFoundation                      0x000000010e199be1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
      46  CoreFoundation                      0x000000010e199463 __CFRunLoopDoSources0 + 243
      47  CoreFoundation                      0x000000010e193b1f __CFRunLoopRun + 1231
      48  CoreFoundation                      0x000000010e193302 CFRunLoopRunSpecific + 626
      49  GraphicsServices                    0x00000001166b42fe GSEventRunModal + 65
      50  UIKitCore                           0x00000001135dcba2 UIApplicationMain + 140
      51  pdfKitTest                          0x000000010bd28a7b main + 75
      52  libdyld.dylib                       0x000000010f63a541 start + 1
      53  ???                                 0x0000000000000001 0x0 + 1
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  (lldb) 
  </code></pre>
  
  <p>If I comment this line: </p>
  
  <pre><code> pdfView.document = pdfDocument
  </code></pre>
  
  <p>the app doesn't crash, but pdf-file also doesn't show, of course. How to fix this problem?</p>