Xcode 11 crashing on iPhone 13.1 app running

Question

I updated Xcode today (Xcode 11.0), and now it crashes every time I try running any project on my iPhone (iOS 13.1).

Already tried:

• Cleaning derived data
• Cleaning library cache folder
• Uninstalling xCode and downloading it again from the store
• Restarting Mac
• Restarting iPhone
• Reconnecting iPhone trough itunes

The odd thing is that the Xcode activity doesn't show the "installing app" phase, it goes straight to "Running app on device" and then crashes. Running on the simulator works without a problem.

Already searched on the Apple forums and sent the report to Apple, but maybe there is something I can do to solve te issue.

Error log:

Process:               Xcode [873] Path:                  /Applications/Xcode.app/Contents/MacOS/Xcode Identifier:            com.apple.dt.Xcode Version:               11.0 (14936) Build Info:            IDEFrameworks-14936000000000000~3 App Item ID:           497799835 App External ID:       832762837 Code Type:             X86-64 (Native) Parent Process:        ??? [1] Responsible:           Xcode [873] User ID:               502  Date/Time:             2019-09-25 11:47:10.497 -0300 OS Version:            Mac OS X 10.14.6 (18G95) Report Version:        12 Anonymous UUID:        XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX   Time Awake Since Boot: 550 seconds  System Integrity Protection: enabled  Crashed Thread:        16  Dispatch queue: Mutex to protect _hasPerformedWorkerAction  Exception Type:        EXC_CRASH (SIGABRT) Exception Codes:       0x0000000000000000, 0x0000000000000000 Exception Note:        EXC_CORPSE_NOTIFY  Application Specific Information: com.apple.main-thread ProductBuildVersion: 11A420a UNCAUGHT EXCEPTION (NSInternalInconsistencyException): Invalid parameter not satisfying: aString != nil UserInfo: (null) Hints:    0: Calling block provided to DVTSyncPerformBlock() here:    0   DVTSyncPerformBlock (in DVTFoundation)   1   -[IDEExecutionRunnableTracker executionWantsHold:withError:] (in IDEFoundation)   2   -[IDERunOperationWorker _startWithRetrying:] (in IDEFoundation)   3   __44-[IDERunOperationWorker _startWithRetrying:]_block_invoke_3 (in IDEFoundation)   4   __48-[DVTDispatchLock_Recursive performLockedBlock:]_block_invoke (in DVTFoundation)   5   _dispatch_client_callout (in libdispatch.dylib)   6   _dispatch_lane_barrier_sync_invoke_and_complete (in libdispatch.dylib)   7   DVTDispatchBarrierSync (in DVTFoundation)   8   -[DVTDispatchLock performLockedBlock:] (in DVTFoundation)   9   -[DVTDispatchLock_Recursive performLockedBlock:] (in DVTFoundation)  10   __44-[IDERunOperationWorker _startWithRetrying:]_block_invoke_2 (in IDEFoundation)  11   __DVT_CALLING_CLIENT_BLOCK__ (in DVTFoundation)  12   __DVTDispatchAfter_block_invoke (in DVTFoundation)  13   _dispatch_client_callout (in libdispatch.dylib)  14   _dispatch_continuation_pop (in libdispatch.dylib)  15   _dispatch_source_invoke (in libdispatch.dylib)  16   _dispatch_continuation_pop (in libdispatch.dylib)  17   _dispatch_async_redirect_invoke (in libdispatch.dylib)  18   _dispatch_root_queue_drain (in libdispatch.dylib)  19   _dispatch_worker_thread2 (in libdispatch.dylib)  20   _pthread_wqthread (in libsystem_pthread.dylib)  21   start_wqthread (in libsystem_pthread.dylib)  Backtrace:   0   __exceptionPreprocess (in CoreFoundation)   1   DVTFailureHintExceptionPreprocessor (in DVTFoundation)   2   objc_exception_throw (in libobjc.A.dylib) ... ... ...     0x7fff63005000 -     0x7fff6300affb  libunwind.dylib (35.4) <24A97A67-F017-3CFC-B0D0-6BD0224B1336> /usr/lib/system/libunwind.dylib     0x7fff6300b000 -     0x7fff6303afff  libxpc.dylib (1336.261.2) <7DEE2300-6D8E-3C00-9C63-E3E80D56B0C4> /usr/lib/system/libxpc.dylib  External Modification Summary:   Calls made by other processes targeting this process:     task_for_pid: 1     thread_create: 0     thread_set_state: 0   Calls made by this process:     task_for_pid: 0     thread_create: 0     thread_set_state: 0   Calls made by all processes on this machine:     task_for_pid: 430     thread_create: 0     thread_set_state: 21  VM Region Summary: ReadOnly portion of Libraries: Total=1.1G resident=0K(0%) swapped_out_or_unallocated=1.1G(100%) Writable regions: Total=1.2G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.2G(100%)                                  VIRTUAL   REGION  REGION TYPE                        SIZE    COUNT (non-coalesced)  ===========                     =======  =======  Accelerate framework               640K        5  Activity Tracing                   256K        1  CG backing stores                 1160K        2  CG image                          1296K       95  CG raster data                      56K        6  CoreAnimation                     25.8M      164  CoreGraphics                         8K        1  CoreImage                          776K       81  CoreUI image data                 3000K       34  CoreUI image file                  688K       14  Dispatch continuations            8192K        1  Foundation                         344K        5  Image IO                            80K        5  JS JIT generated code              1.0G        3  Kernel Alloc Once                 1036K        2  MALLOC                           136.4M      116  MALLOC guard page                   48K       10  Memory Tag 242                      12K        1  Memory Tag 251                      64K        3  Performance tool data             8208K        1         not counted in TOTAL below SQLite page cache                  128K        2  STACK GUARD                       56.1M       23  Stack                             19.2M       23  VM_ALLOCATE                        360K       24  WebKit Malloc                     1144K        3  __DATA                            94.4M      755  __DATA_CONST                         8K        1  __FONT_DATA                          4K        1  __LINKEDIT                       357.4M      236  __TEXT                           723.4M      680  __UNICODE                          564K        1  libnetwork                        1152K        4  mapped file                      169.2M      230  shared memory                      676K       15  ===========                     =======  =======  TOTAL                              2.6G     2547   Model: MacBookPro12,1, BootROM 186.0.0.0.0, 2 processors, Intel Core i5, 2,9 GHz, 8 GB, SMC 2.28f7 Graphics: kHW_IntelIris6100Item, Intel Iris Graphics 6100, spdisplays_builtin Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1867 MHz, 0x80AD, 0x483943434E4E4E424C54424C41522D4E5544 Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1867 MHz, 0x80AD, 0x483943434E4E4E424C54424C41522D4E5544 AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x133), Broadcom BCM43xx 1.0 (7.77.61.2 AirPortDriverBrcmNIC-1305.8) Bluetooth: Version 6.0.14d3, 3 services, 27 devices, 1 incoming serial ports Network Service: Wi-Fi, AirPort, en0 Serial ATA Device: APPLE SSD SM0512G, 500,28 GB USB Device: USB 3.0 Bus USB Device: Bluetooth USB Host Controller USB Device: iPhone Thunderbolt Bus: MacBook Pro, Apple Inc., 27.1 

Answer 1

So, I found that inside this folder:

~/Library/Developer/Xcode/iOS DeviceSupport 

Xcode creates cache folders for all the physical devices symbols it paired.

This folder remains even if you uninstall Xcode, and the cache is reused even when you install other versions of the software.

Deleting the folders content made Xcode download the symbols again, run prepare debug support for the device phase and reset the device connection, solving the problem.