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Hello.I received a crash report from a user on iOS 12.4 (beta?) and when I try to symbolicate the crash report using Xcode 10.2.1 (10E1001) the UIKitCore lines are not symbolicated.How can I symbolicate those lines?Thank youHardware Model: iPhone11,2 Code Type: ARM-64 Parent Process: ? [1] Date/Time: 2019-06-26 11:17:09.000 +0100 OS Version: iOS 12.4 (16G5038d) Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x00000000 at 0x0000000000000000 Crashed Thread: 0 Application Specific Information: *** Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <__NSArrayM: 0x280ad6670> was mutated while being enumerated.' Thread 0 Crashed: 0 CoreFoundation 0x00000001db69b3a8 0x1db57d000 + 1172392 1 libobjc.A.dylib 0x00000001da89fd00 objc_exception_throw + 60 2 CoreFoundation 0x00000001db69ac10 0x1db57d000 + 1170448 3 libobjc.A.dylib 0x00000001da8b24a0 objc_enumerationMutation + 32 4 UIKitCore 0x0000000208c5e234 0x208a8b000 + 1913396 5 UIKitCore 0x0000000208c62f64 0x208a8b000 + 1933156 6 UIKitCore 0x0000000209829fe0 0x208a8b000 + 14282720 7 UIKitCore 0x0000000208c6203c 0x208a8b000 + 1929276 8 UIKitCore 0x0000000208c5d224 0x208a8b000 + 1909284 9 UIKitCore 0x0000000208c640fc 0x208a8b000 + 1937660 10 UIKitCore 0x0000000208c64468 0x208a8b000 + 1938536 11 UIKitCore 0x0000000208c642b0 0x208a8b000 + 1938096 12 UIKitCore 0x0000000208c6422c 0x208a8b000 + 1937964 13 UIKitCore 0x0000000208c64158 0x208a8b000 + 1937752 14 MyApp 0x0000000102da6b70 specialized MessagesViewController.messagesDataSource(_:didChange:) + 2288496 (MessagesViewController.swift:0) 15 MyApp 0x0000000102e2e040 closure #4 in MessagesDataSourceImplSectioned.managedObjectContextObjectsDidSave(notification:) + 2842688 (MessagesDataSourceImplSectioned.swift:0) 16 MyApp 0x0000000102c11848 thunk for @escaping @callee_guaranteed () -> () + 628808 (<compiler-generated>:0) 17 libdispatch.dylib 0x00000001db0a8304 0x1db0a5000 + 13060 18 libdispatch.dylib 0x00000001db0a9884 0x1db0a5000 + 18564 19 libdispatch.dylib 0x00000001db0b573c _dispatch_main_queue_callback_4CF + 1012 20 CoreFoundation 0x00000001db62b024 0x1db57d000 + 712740 21 CoreFoundation 0x00000001db625cd4 0x1db57d000 + 691412 22 CoreFoundation 0x00000001db625254 CFRunLoopRunSpecific + 452 23 GraphicsServices 0x00000001dd865d8c GSEventRunModal + 108 24 UIKitCore 0x00000002093825b8 UIApplicationMain + 216 25 MyApp 0x0000000102b7feb4 main + 32436 (BaseCell.swift:23) 26 libdyld.dylib 0x00000001db0e0fd8 0x1db0e0000 + 4056