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launchdarkly / ios-client-sdk

LaunchDarkly Client-side SDK for iOS (Swift and Obj-C)
https://docs.launchdarkly.com/sdk/client-side/ios
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Crash in LDClient.swift:143 #236

Closed maciejtrybilo closed 3 years ago

maciejtrybilo commented 3 years ago

Describe the bug We've received a following crash report

`Incident Identifier: 6bd47464-3144-4e44-a154-622ac8027fd8 CrashReporter Key: D656D0BB-0F99-4E45-BC7A-4DAAE5D5B57F Hardware Model: iPhone11,8 Process: App-Name [29794] Code Type: arm64 Parent Process: [1]

Date/Time: 2021-02-02T10:45:58.999Z Launch Time: 2021-02-02T10:45:55Z OS Version: iPhone OS 14.3 (18C66) Report Version: 104

Exception Type: SIGTRAP Exception Codes: TRAP_BRKPT at 0x193ff17d8 Crashed Thread: 0

Thread 0 Crashed: 0 libdispatch.dylib 0x0000000193ff17d8 dispatch_group_leave.cold.1 + 36 1 libdispatch.dylib 0x0000000193fbec00 dispatch_group_leave + 136 2 LaunchDarkly 0x0000000106db9adc partial apply forwarder for closure #2 () -> () in LaunchDarkly.LDClient.(go in _14C52C04C80D938C2FE76924F7908AD1)(online: Swift.Bool, reasonOnlineUnavailable: Swift.String, completion: () -> ()?) -> () (LDClient.swift:143) 3 LaunchDarkly 0x0000000106d99190 partial apply forwarder for closure #1 () -> () in closure #1 (LaunchDarkly.FlagsUnchangedObserver) -> () in closure #1 () -> () in LaunchDarkly.FlagChangeNotifier.notifyObservers(flagStore: LaunchDarkly.FlagMaintaining, oldFlags: [Swift.String : LaunchDarkly.FeatureFlag]) -> () (FlagChangeNotifier.swift:94) 4 LaunchDarkly 0x0000000106d760a0 reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_unowned @convention(block) () -> () (:0) 5 libdispatch.dylib 0x0000000193fbc24c _dispatch_call_block_and_release + 28 6 libdispatch.dylib 0x0000000193fbddb0 _dispatch_client_callout + 16 7 libdispatch.dylib 0x0000000193fcb7ac _dispatch_main_queue_callback_4CF + 832 8 CoreFoundation 0x000000019434511c CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 12 9 CoreFoundation 0x000000019433f120 __CFRunLoopRun + 2504 10 CoreFoundation 0x000000019433e21c CFRunLoopRunSpecific + 596 11 GraphicsServices 0x00000001abe42784 GSEventRunModal + 160 12 UIKitCore 0x0000000196d7cfe0 -[UIApplication _run] + 1068 13 UIKitCore 0x0000000196d82854 UIApplicationMain + 164 14 App-Name 0x0000000104f6712c main (AppDelegate.swift:19) 15 libdyld.dylib 0x0000000193ffe6b0 start + 0

Thread 1: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 2: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 3: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 4: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 5: 0 libsystem_pthread.dylib 0x00000001dfba2754 start_wqthread + 0

Thread 6: 0 libsystem_kernel.dylib 0x00000001c211c2d0 mach_msg_trap + 8 1 CoreFoundation 0x0000000194344c30 CFRunLoopServiceMachPort + 376 2 CoreFoundation 0x000000019433ec14 CFRunLoopRun + 1212 3 CoreFoundation 0x000000019433e21c CFRunLoopRunSpecific + 596 4 Foundation 0x00000001955eddf0 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 228 5 Foundation 0x00000001955edcbc -[NSRunLoop(NSRunLoop) runUntilDate:] + 88 6 UIKitCore 0x0000000196e30d48 -[UIEventFetcher threadMain] + 512 7 Foundation 0x000000019575fa34 NSThreadstart__ + 860 8 libsystem_pthread.dylib 0x00000001dfb99b40 _pthread_start + 316 9 libsystem_pthread.dylib 0x00000001dfba2768 thread_start + 4

Thread 7: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 8: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 9: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 10: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 11: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 12: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 13: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 14: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 15: 0 libsystem_kernel.dylib 0x00000001c2141184 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x00000001dfba275c start_wqthread + 4

Thread 16: 0 App-Name 0x0000000105391838 mach_exception_callback (PLCrashReporter.m:291) 1 App-Name 0x00000001053a076c exception_server_thread (PLCrashMachExceptionServer.m:770) 2 libsystem_pthread.dylib 0x00000001dfb99b40 _pthread_start + 316 3 libsystem_pthread.dylib 0x00000001dfba2768 thread_start + 4

Thread 17: 0 libsystem_kernel.dylib 0x00000001c211c2d0 mach_msg_trap + 8 1 CoreFoundation 0x0000000194344c30 CFRunLoopServiceMachPort + 376 2 CoreFoundation 0x000000019433ec14 CFRunLoopRun + 1212 3 CoreFoundation 0x000000019433e21c CFRunLoopRunSpecific + 596 4 CFNetwork 0x0000000194c142c0 _CFURLStorageSessionCopyCache + 64448 5 Foundation 0x000000019575fa34 NSThreadstart__ + 860 6 libsystem_pthread.dylib 0x00000001dfb99b40 _pthread_start + 316 7 libsystem_pthread.dylib 0x00000001dfba2768 thread_start + 4

Thread 18: 0 libsystem_kernel.dylib 0x00000001c211c2d0 mach_msg_trap + 8 1 CoreFoundation 0x0000000194344c30 CFRunLoopServiceMachPort + 376 2 CoreFoundation 0x000000019433ec14 CFRunLoopRun + 1212 3 CoreFoundation 0x000000019433e21c CFRunLoopRunSpecific + 596 4 Foundation 0x00000001955eddf0 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 228 5 App-Name 0x00000001057b73a8 -[GMSx_GTMSimpleWorkerThread main] + 180 6 Foundation 0x000000019575fa34 NSThreadstart__ + 860 7 libsystem_pthread.dylib 0x00000001dfb99b40 _pthread_start + 316 8 libsystem_pthread.dylib 0x00000001dfba2768 thread_start + 4

Thread 0 crashed with arm64 Thread State: x21: 0x00000002803d0760 x2: 0x0000000000000002 x16: 0x0000000193fbeb74 x3: 0x00000001a411acdc x22: 0x00000002817c26c0 x4: 0x00000000000062dc x17: 0x0000000016a00000 cpsr: 0x0000000000000000 x5: 0x0000000000000001 x23: 0x0000000000000000 x6: 0x0000000000000003 x18: 0x000000010f9dcac0 x10: 0x0000000000000070 lr: 0x0000000193fbec00 x7: 0x0000000000000004 x24: 0x0000000002ffffff x11: 0x0000000000000100 x8: 0x0000000000000000 x19: 0x000000010885ee00 x25: 0x000000010644b9a0 x9: 0x0000000000000004 x12: 0x0000000000002000 fp: 0x000000016aea29c0 x26: 0x00000000000020ff x13: 0x000000009683c020 pc: 0x0000000193ff17d8 x27: 0x0000000000000114 x14: 0x0000000096a3c800 x20: 0x0000000280224060 x0: 0x0000000000000000 sp: 0x000000016aea29c0 x28: 0x00000002817c26c0 x15: 0x0000000000000079 x1: 0x0000000193fbc22c `

To reproduce I'm not able to reproduce, but the report came in just after I made some changes in the portal. Not sure if it's related.

Expected behavior No crash.

SDK version 5.3.1

bwoskow-ld commented 3 years ago

Hi @maciejtrybilo ,

This looks like the same problem as described in #235. I'm going to close this -- let's consolidate the conversation over there.