title: How do i resolve this error while running react-native project in Xcode?
body: <p><strong>Here is the log in Xcode</strong></p>
  
  <pre><code>2017-09-05 11:12:06.477 AppDemo[5064:29077] -[NSTaggedPointerString unsignedIntValue]: unrecognized selector sent to instance 0xa303036383231327
  2017-09-05 11:12:06.642 AppDemo[5064:29077] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSTaggedPointerString unsignedIntValue]: unrecognized selector sent to instance 0xa303036383231327'
  *** First throw call stack:
  (
      0   CoreFoundation                      0x0000000110564b0b __exceptionPreprocess + 171
      1   libobjc.A.dylib                     0x000000010f41a141 objc_exception_throw + 48
      2   CoreFoundation                      0x00000001105d4134 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
      3   CoreFoundation                      0x00000001104eb840 ___forwarding___ + 1024
      4   CoreFoundation                      0x00000001104eb3b8 _CF_forwarding_prep_0 + 120
      5   AppDemo                             0x000000010e7cfc94 -[RCTMultipartStreamReader emitProgress:contentLength:final:callback:] + 244
      6   AppDemo                             0x000000010e7d048a -[RCTMultipartStreamReader readAllPartsWithCompletionCallback:progressCallback:] + 1610
      7   AppDemo                             0x000000010e81fdbc -[RCTMultipartDataTask URLSession:streamTask:didBecomeInputStream:outputStream:] + 444
      8   CFNetwork                           0x000000010ffc4c51 __88-[NSURLSession delegate_streamTask:didBecomeInputStream:outputStream:completionHandler:]_block_invoke + 51
      9   Foundation                          0x000000010ef243b7 __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 7
      10  Foundation                          0x000000010ef240bb -[NSBlockOperation main] + 101
      11  Foundation                          0x000000010ef22877 -[__NSOperationInternal _start:] + 627
      12  Foundation                          0x000000010ef1e5fc __NSOQSchedule_f + 198
      13  libdispatch.dylib                   0x000000011424605c _dispatch_client_callout + 8
      14  libdispatch.dylib                   0x000000011422494f _dispatch_queue_serial_drain + 221
      15  libdispatch.dylib                   0x0000000114225669 _dispatch_queue_invoke + 1084
      16  libdispatch.dylib                   0x0000000114227ec4 _dispatch_root_queue_drain + 634
      17  libdispatch.dylib                   0x0000000114227bef _dispatch_worker_thread3 + 123
      18  libsystem_pthread.dylib             0x00000001145dd712 _pthread_wqthread + 1299
      19  libsystem_pthread.dylib             0x00000001145dd1ed start_wqthread + 13
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  </code></pre>