com.apple.corelocation.shared Crash after implementation of live updates

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Created 4d

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After the implementation of liveUpdates(_:) to receive asynchronous sequence of location updates, we are receiving crash reports on a huge number of users. However we cannot reproduce the crash so any help is much appreciated.

This is the stack trace:

com.apple.main-thread 0 libsystem_kernel.dylib 0xce4 mach_msg2_trap + 8 1 libsystem_kernel.dylib 0x439c mach_msg2_internal + 76 2 libsystem_kernel.dylib 0x42b8 mach_msg_overwrite + 428 3 libsystem_kernel.dylib 0x4100 mach_msg + 24 4 CoreFoundation 0x717b0 __CFRunLoopServiceMachPort + 160 5 CoreFoundation 0x70e90 __CFRunLoopRun + 1208 6 CoreFoundation 0x957f0 CFRunLoopRunSpecific + 572 7 GraphicsServices 0x1190 GSEventRunModal + 168 8 UIKitCore 0x3ca158 -[UIApplication _run] + 816 9 UIKitCore 0x3c8388 UIApplicationMain + 336 10 atto 0x6a41a0 main + 25 (AppDelegate.swift:25) 11 ??? 0x1ac153a58 (Missing)

com.apple.uikit.eventfetch-thread 0 libsystem_kernel.dylib 0xce4 mach_msg2_trap + 8 1 libsystem_kernel.dylib 0x439c mach_msg2_internal + 76 2 libsystem_kernel.dylib 0x42b8 mach_msg_overwrite + 428 3 libsystem_kernel.dylib 0x4100 mach_msg + 24 4 CoreFoundation 0x717b0 __CFRunLoopServiceMachPort + 160 5 CoreFoundation 0x70e90 __CFRunLoopRun + 1208 6 CoreFoundation 0x957f0 CFRunLoopRunSpecific + 572 7 Foundation 0x74728 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 8 Foundation 0x73558 -[NSRunLoop(NSRunLoop) runUntilDate:] + 64 9 UIKitCore 0x4bd354 -[UIEventFetcher threadMain] + 424 10 Foundation 0x115f40 NSThread__start + 732 11 libsystem_pthread.dylib 0x1afc _pthread_start + 136 12 libsystem_pthread.dylib 0x1a04 thread_start + 8

com.google.firebase.crashlytics.MachExceptionServer 0 FirebaseCrashlytics 0x21c10 FIRCLSProcessRecordAllThreads + 184 1 FirebaseCrashlytics 0x21ff0 FIRCLSProcessRecordAllThreads + 1176 2 FirebaseCrashlytics 0x18e74 FIRCLSHandler + 48 3 FirebaseCrashlytics 0x1b804 FIRCLSMachExceptionServer + 688 4 libsystem_pthread.dylib 0x1afc _pthread_start + 136 5 libsystem_pthread.dylib 0x1a04 thread_start + 8

com.apple.NSURLConnectionLoader 0 libsystem_kernel.dylib 0xce4 mach_msg2_trap + 8 1 libsystem_kernel.dylib 0x439c mach_msg2_internal + 76 2 libsystem_kernel.dylib 0x42b8 mach_msg_overwrite + 428 3 libsystem_kernel.dylib 0x4100 mach_msg + 24 4 CoreFoundation 0x717b0 __CFRunLoopServiceMachPort + 160 5 CoreFoundation 0x70e90 __CFRunLoopRun + 1208 6 CoreFoundation 0x957f0 CFRunLoopRunSpecific + 572 7 CFNetwork 0xeba68 +[__CFN_CoreSchedulingSetRunnable _run:] + 416 8 Foundation 0x115f40 NSThread__start + 732 9 libsystem_pthread.dylib 0x1afc _pthread_start + 136 10 libsystem_pthread.dylib 0x1a04 thread_start + 8

Thread 0 libsystem_kernel.dylib 0xa90 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x46ac _pthread_wqthread + 368 2 libsystem_pthread.dylib 0x19f8 start_wqthread + 8

Crashed: com.apple.corelocation.shared 0 libobjc.A.dylib 0x2050 objc_release_x8 + 16 1 libsystem_blocks.dylib 0x1d30 bool HelperBase<ExtendedInline>::disposeCapture<(HelperBase<ExtendedInline>::BlockCaptureKind)3>(unsigned int, unsigned char*) + 68 2 libsystem_blocks.dylib 0x16a8 HelperBase<GenericInline>::destroyBlock(Block_layout*, bool, unsigned char*) + 116 3 libsystem_blocks.dylib 0x1180 _call_dispose_helpers_excp + 72 4 libsystem_blocks.dylib 0x111c _Block_release + 236 5 libsystem_blocks.dylib 0xff4 bool HelperBase<ExtendedInline>::disposeCapture<(HelperBase<ExtendedInline>::BlockCaptureKind)4>(unsigned int, unsigned char*) + 68 6 libsystem_blocks.dylib 0x16f8 HelperBase<GenericInline>::destroyBlock(Block_layout*, bool, unsigned char*) + 196 7 libsystem_blocks.dylib 0x1180 _call_dispose_helpers_excp + 72 8 libsystem_blocks.dylib 0x111c _Block_release + 236 9 libdispatch.dylib 0x1b4f8 _dispatch_client_callout + 16 10 libdispatch.dylib 0xa2cc _dispatch_lane_serial_drain + 736 11 libdispatch.dylib 0xad90 _dispatch_lane_invoke + 380 12 libdispatch.dylib 0x15178 _dispatch_root_queue_drain_deferred_wlh + 292 13 libdispatch.dylib 0x149fc _dispatch_workloop_worker_thread + 540 14 libsystem_pthread.dylib 0x4660 _pthread_wqthread + 292 15 libsystem_pthread.dylib 0x19f8 start_wqthread + 8

Thread 0 libsystem_pthread.dylib 0x19f0 start_wqthread + 142

Boost

Answer 1

Engineer OP

Apple

4d

To investigate and resolve the crash, please follow these steps:

Collect a crash report created by the operating system. See Acquiring Crash Reports and Diagnostic Logs.
Fully symbolicate the crash report. See Adding Identifiable Symbol Names to a Crash Report.
Match the crash report to a common pattern. Based on the pattern, take specific actions to further investigate the crash. See Identifying the Cause of Common Crashes.

For additional help investigating why your app crashed, please refer to the following resources:

If you still cannot resolve the crash, you can share your findings here for us or the developer community to help. If you do not want to share information that could be disclosed in the crash logs publicly, you can open a support request at Code-level support request and reference this forum thread in the "Did someone from Apple ask you to submit ..." section

For us to be able to assist with this issue we need the following:

the fully symbolicated Apple crash report from step 2. Do not send crash logs generated by third-party analytics libraries.
details of the debugging actions you took in step 3.

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