In my iOS app "Progression" there is rarely a crash (1 crash in ~1000+ Sessions) I am currently not able to fix. The message is
Progression: protocol witness for TrainingSetSessionManager.update(object:weight:reps:) in conformance TrainingSetSessionDataManager + 40
This crash points me to the following method:
func update(object: TrainingSetSession, weight: Double?, reps: Int?) { try? realm.write { // <-- crashes if let weight = weight { object.amountOfWeight = weight } if let reps = reps { object.numberOfReps = reps } } }The stack trace looks like this:
Exception Type: EXC_BAD_ACCESS (SIGSEGV)Exception Subtype: KERN_INVALID_ADDRESS at 0x000000010c622340VM Region Info: 0x10c622340 is not in any region. Bytes after previous region: 49423169 Bytes before following region: 58580160 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL mapped file 108e44000-109700000 [ 8944K] r--/r-- SM=ALI ...t_id=259b6c25---> GAP OF 0x6700000 BYTES MALLOC_TINY 10fe00000-10ff00000 [ 1024K] rw-/rwx SM=PRV Termination Signal: Segmentation fault: 11Termination Reason: Namespace SIGNAL, Code 0xbTerminating Process: exc handler [2042]Triggered by Thread: 0Thread 0 name:Thread 0 Crashed:0 Progression 0x0000000104bf0a30 0x104984000 + 25421281 Progression 0x0000000104c5eab0 0x104984000 + 29928162 Progression 0x0000000104c5da90 0x104984000 + 29886883 Progression 0x0000000104c5e188 0x104984000 + 29904724 Progression 0x0000000104c91428 0x104984000 + 32000405 Progression 0x0000000104caee14 0x104984000 + 33213646 Progression 0x0000000104cad5c8 0x104984000 + 33151447 Progression 0x0000000104cec258 0x104984000 + 35723128 Progression 0x0000000104b5605c 0x104984000 + 19088289 Progression 0x0000000104b5a6b0 0x104984000 + 192683210 Progression 0x0000000104a1f234 0x104984000 + 63544411 Progression 0x0000000104aab410 0x104984000 + 120936012 Progression 0x0000000104a1f6ac 0x104984000 + 63658813 libswiftFoundation.dylib 0x00000001a3985b3c NSFastEnumerationIterator.next() + 196 (NSFastEnumeration.swift:46)14 Progression 0x0000000104afd344 0x104984000 + 154502815 libswiftCore.dylib 0x00000001a3ac7d0c Sequence._copyContents(initializing:) + 516 (Sequence.swift:1110)16 libswiftCore.dylib 0x00000001a3ae0120 _copyCollectionToContiguousArray<A>(_:) + 604 (ContiguousArrayBuffer.swift:725)17 Progression 0x0000000104b006e4 0x104984000 + 155824418 libswiftCore.dylib 0x00000001a3ad7a00 Array.init<A>(_:) + 44 (Array.swift:849)19 Progression 0x0000000104f7fe28 0x104984000 + 627460020 Progression 0x0000000104f830c8 0x104984000 + 628756021 Progression 0x0000000104e79fac 0x104984000 + 520183622 Progression 0x0000000104e7a18c 0x104984000 + 520231623 Progression 0x0000000104ea21e8 0x104984000 + 536624824 Progression 0x0000000104e61798 0x104984000 + 510146425 Progression 0x0000000104e61878 0x104984000 + 510168826 Progression 0x0000000104e3cb78 0x104984000 + 495090427 Progression 0x0000000104e3c5ec 0x104984000 + 494948428 Progression 0x0000000104e85f00 0x104984000 + 525081629 Progression 0x0000000104f7fc74 0x104984000 + 627416430 Progression 0x0000000104b00ce8 0x104984000 + 155978431 Progression 0x0000000104b028b8 0x104984000 + 156690432 Progression 0x0000000104ae0c94 0x104984000 + 142862833 Progression 0x0000000104ae0d8c 0x104984000 + 142887634 Progression 0x0000000104a23428 0x104984000 + 65232835 Progression 0x0000000104a2323c 0x104984000 + 65183636 Progression 0x0000000104b1bd6c 0x104984000 + 167050837 Progression 0x0000000104b1c804 0x104984000 + 167322038 Progression 0x0000000104b2e1c8 0x104984000 + 174535239 Progression 0x0000000104b25cb0 0x104984000 + 171128040 Progression 0x0000000104b6d344 0x104984000 + 200378041 Progression 0x0000000104aa2658 0x104984000 + 117308042 Progression 0x0000000104afab58 0x104984000 + 153480843 Progression 0x0000000104999c68 TrainingSetSessionDataManager.update(object:weight:reps:) + 40 (TrainingSetSessionDataManager.swift:53)44 Progression 0x0000000104999c68 protocol witness for TrainingSetSessionManager.update(object:weight:reps:) in conformance TrainingSetSessionDataManager + 40 (<compiler-generated>:52)45 Progression 0x0000000104999c68 TrainingSetCell.amountOfWeight.setter + 732 (TrainingSetCell.swift:116)46 Progression 0x000000010499b368 TrainingSetCell.setCell() + 1060 (TrainingSetCell.swift:248)47 Progression 0x00000001049d9064 TrainingSetCell.viewModel.didset + 8 (TrainingSetCell.swift:61)48 Progression 0x00000001049d9064 TrainingSetCell.viewModel.setter + 8 (TrainingSetCell.swift:0)49 Progression 0x00000001049d9064 TrainingSessionViewController.tableView(_:cellForRowAt:) + 236 (TrainingSessionViewController.swift:285)50 Progression 0x00000001049d9290 @objc TrainingSessionViewController.tableView(_:cellForRowAt:) + 140 (<compiler-generated>:0)51 UIKitCore 0x00000001a2ae8120 -[_UIFilteredDataSource tableView:cellForRowAtIndexPath:] + 104 (_UIFilteredDataSource.m:87)52 UIKitCore 0x00000001a2ab3168 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 644 (UITableView.m:15012)53 UIKitCore 0x00000001a2a7ef00 -[UITableView _updateVisibleCellsNow:] + 2476 (UITableView.m:2953)54 UIKitCore 0x00000001a2a9d310 -[UITableView layoutSubviews] + 368 (UITableView.m:9632)55 UIKitCore 0x00000001a2dd1f84 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2504 (UIView.m:17526)56 QuartzCore 0x00000001a32ec7b4 -[CALayer layoutSublayers] + 308 (CALayer.mm:10147)57 QuartzCore 0x00000001a32ecc88 CA::Layer::layout_if_needed(CA::Transaction*) + 524 (CALayer.mm:10014)58 QuartzCore 0x00000001a330147c CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 144 (CALayer.mm:2485)59 QuartzCore 0x00000001a3246a6c CA::Context::commit_transaction(CA::Transaction*, double, double*) + 416 (CAContextInternal.mm:2449)60 QuartzCore 0x00000001a3271f34 CA::Transaction::commit() + 732 (CATransactionInternal.mm:449)61 QuartzCore 0x00000001a32732c4 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 96 (CATransactionInternal.mm:932)62 CoreFoundation 0x000000019fe4c358 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 (CFRunLoop.c:1799)63 CoreFoundation 0x000000019fe465c4 __CFRunLoopDoObservers + 576 (CFRunLoop.c:1912)64 CoreFoundation 0x000000019fe46b74 __CFRunLoopRun + 1056 (CFRunLoop.c:2953)65 CoreFoundation 0x000000019fe4621c CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242)66 GraphicsServices 0x00000001b794a784 GSEventRunModal + 164 (GSEvent.c:2259)67 UIKitCore 0x00000001a2884fe0 -[UIApplication _run] + 1072 (UIApplication.m:3253)68 UIKitCore 0x00000001a288a854 UIApplicationMain + 168 (UIApplication.m:4707)69 Progression 0x000000010498ae50 main + 68 (AppDelegate.swift:14)70 libdyld.dylib 0x000000019fb066b0 start + 4Thread 1:0 libsystem_pthread.dylib 0x00000001eb6aa754 start_wqthread + 0Thread 2 name:Thread 2:0 libsystem_kernel.dylib 0x00000001cdc242d0 mach_msg_trap + 81 libsystem_kernel.dylib 0x00000001cdc23660 mach_msg + 76 (mach_msg.c:103)2 CoreFoundation 0x000000019fe4cc30 __CFRunLoopServiceMachPort + 380 (CFRunLoop.c:2641)3 CoreFoundation 0x000000019fe46c14 __CFRunLoopRun + 1216 (CFRunLoop.c:2974)4 CoreFoundation 0x000000019fe4621c CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242)5 Foundation 0x00000001a10f5df0 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 232 (NSRunLoop.m:374)6 Foundation 0x00000001a10f5cbc -[NSRunLoop(NSRunLoop) runUntilDate:] + 92 (NSRunLoop.m:421)7 UIKitCore 0x00000001a2938d48 -[UIEventFetcher threadMain] + 516 (UIEventFetcher.m:838)8 Foundation 0x00000001a1267a34 __NSThread__start__ + 864 (NSThread.m:724)9 libsystem_pthread.dylib 0x00000001eb6a1b40 _pthread_start + 320 (pthread.c:881)10 libsystem_pthread.dylib 0x00000001eb6aa768 thread_start + 8Thread 3 name:Thread 3:0 libsystem_kernel.dylib 0x00000001cdc4a230 kevent + 81 Progression 0x0000000104b11c14 0x104984000 + 16292042 Progression 0x0000000104b125e8 0x104984000 + 16317203 libsystem_pthread.dylib 0x00000001eb6a1b40 _pthread_start + 320 (pthread.c:881)4 libsystem_pthread.dylib 0x00000001eb6aa768 thread_start + 8Thread 4 name:Thread 4:0 libsystem_kernel.dylib 0x00000001cdc242d0 mach_msg_trap + 81 libsystem_kernel.dylib 0x00000001cdc23660 mach_msg + 76 (mach_msg.c:103)2 CoreFoundation 0x000000019fe4cc30 __CFRunLoopServiceMachPort + 380 (CFRunLoop.c:2641)3 CoreFoundation 0x000000019fe46c14 __CFRunLoopRun + 1216 (CFRunLoop.c:2974)4 CoreFoundation 0x000000019fe4621c CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242)5 AudioSession 0x00000001a79000c4 GenericRunLoopThread::Entry(void*) + 164 (GenericRunLoopThread.h:91)6 AudioSession 0x00000001a790225c CAPThread::Entry(CAPThread*) + 92 (CAPThread.cpp:321)7 libsystem_pthread.dylib 0x00000001eb6a1b40 _pthread_start + 320 (pthread.c:881)8 libsystem_pthread.dylib 0x00000001eb6aa768 thread_start + 8Thread 5:0 libsystem_pthread.dylib 0x00000001eb6aa754 start_wqthread + 0Thread 6:0 libsystem_pthread.dylib 0x00000001eb6aa754 start_wqthread + 0Thread 7:0 libsystem_pthread.dylib 0x00000001eb6aa754 start_wqthread + 0Thread 8:0 libsystem_pthread.dylib 0x00000001eb6aa754 start_wqthread + 0Thread 9:0 libsystem_pthread.dylib 0x00000001eb6aa754 start_wqthread + 0Thread 0 crashed with ARM Thread State (64-bit): x0: 0x00000002824cb110 x1: 0x00000000009b4604 x2: 0x0000000000000000 x3: 0x0000000000000000 x4: 0x0000000283ee4c48 x5: 0x0000000000000010 x6: 0x0000000000000049 x7: 0x000000020298de50 x8: 0x000000010787f320 x9: 0x0000000000000000 x10: 0x0000000000000005 x11: 0x0000000074200000 x12: 0x0000000000000038 x13: 0x0000000000000001 x14: 0x0000000000000036 x15: 0x0000000000000010 x16: 0x00000001afc27fe0 x17: 0x00000001ffad5380 x18: 0x000000011b53e89c x19: 0x00000002824cb1e0 x20: 0x00000002824cb100 x21: 0x00000002824cb1e0 x22: 0x0000000110032400 x23: 0x000000016b476040 x24: 0x0000000283ee4c48 x25: 0x000000016b4769e0 x26: 0x000000016b4768f0 x27: 0x000000020298e150 x28: 0x00000001051c10d0 fp: 0x000000016b475e70 lr: 0x0000000104c5eab0 sp: 0x000000016b475e70 pc: 0x0000000104bf0a30 cpsr: 0x60000000 esr: 0x92000006 (Data Abort) byte read Translation faultI have different reports for this crash and some show me different summaries. I list some of them, the stack trace always leads to my update function.
Exception Type: EXC_BAD_ACCESS (SIGSEGV)Exception Subtype: KERN_INVALID_ADDRESS at 0x0000009cc6ab0e28 -> 0x0000001cc6ab0e28 (possible pointer authentication failure)VM Region Info: 0x1cc6ab0e28 is in 0x1000000000-0x7000000000; bytes after start: 54872706600 bytes before end: 357444153815 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL commpage (reserved) fc0000000-1000000000 [ 1.0G] ---/--- SM=NUL ...(unallocated)---> GPU Carveout (reserved) 1000000000-7000000000 [384.0G] ---/--- SM=NUL ...(unallocated) UNUSED SPACE AT ENDTermination Signal: Segmentation fault: 11Termination Reason: Namespace SIGNAL, Code 0xbTerminating Process: exc handler [13261]Triggered by Thread: 0Exception Type: EXC_BAD_ACCESS (SIGSEGV)Exception Subtype: KERN_INVALID_ADDRESS at 0x00000c02836f4068 -> 0x00000002836f4068 (possible pointer authentication failure)VM Region Info: 0x2836f4068 is in 0x280000000-0x2a0000000; bytes after start: 57622632 bytes before end: 479248279 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL unused shlib __TEXT 1fe08a000-1fe93c000 [ 8904K] r--/r-- SM=COW ... this process GAP OF 0x816c4000 BYTES---> MALLOC_NANO 280000000-2a0000000 [512.0M] rw-/rwx SM=PRV GAP OF 0xd20000000 BYTES commpage (reserved) fc0000000-1000000000 [ 1.0G] ---/--- SM=NUL ...(unallocated)Termination Signal: Segmentation fault: 11Termination Reason: Namespace SIGNAL, Code 0xbTerminating Process: exc handler [63749]Triggered by Thread: 0Exception Type: EXC_CRASH (SIGABRT)Exception Codes: 0x0000000000000000, 0x0000000000000000Exception Note: EXC_CORPSE_NOTIFYTriggered by Thread: 0This update function can be triggered by the user either by pressing a button or by ending editing a textfield. I am currently not able to reproduce this crash.
I use realm as a database, I updated realm to the latest version and used different versions.
Does anyone know what causes the crash?