RightToLeft.swift line 12 specialized static RightToLeft.isRightToLeft(UIView) -> Bool

[agfa555]

• Library setup method: CocoaPods
• Version of the library: Latest (7.0.1)
• Xcode version: 8.3.3
• OS version: iOS 9

Crashlytics has been giving some crashes in the following line for iOS 9 only:

RightToLeft.swift line 12
specialized static RightToLeft.isRightToLeft(UIView) -> Bool

This started around a month ago.
Any ideas??

Thanks!

[evgenyneu]

Thanks for reporting. There are two things at line 12:

• UIView.userInterfaceLayoutDirection
• view.semanticContentAttribute

Both are introduced in iOS 9, according to documentation. I wonder what is causing them to crash?

[evgenyneu]

I've just tested the demo app in iOS 9.3 simulator - these functions were called without crash. Do you have any other information for that crash (call stack, error message etc.)?

[agfa555]

Hi, I was very surprised too because I've been using your library without issues for more than a year.
Weirdest thing is that it's a slider with locally saved images. I have another one in another point of the App with dynamic downloaded images which doesn't crash. Maybe it's not even your Library but just wanted to let you know.
I'll continue to investigate.

I do have stack traces. Here is one example.

Date: 2017-07-21T03:04:00Z
OS Version: 9.3.3 (12F70)
Device: iPhone 5c
RAM Free: 22.5%
Disk Free: 47.6%

#0. Crashed: com.twitter.crashlytics.ios.exception
0 Pomelo 0x464831 CLSProcessRecordAllThreads (CLSProcess.c:376)
1 Pomelo 0x464831 CLSProcessRecordAllThreads (CLSProcess.c:376)
2 Pomelo 0x464723 CLSProcessRecordAllThreads (CLSProcess.c:407)
3 Pomelo 0x458851 CLSHandler (CLSHandler.m:26)
4 Pomelo 0x463113 __CLSExceptionRecord_block_invoke (CLSException.mm:199)
5 libdispatch.dylib 0x323bd2cf _dispatch_client_callout + 22
6 libdispatch.dylib 0x323c4a3d _dispatch_barrier_sync_f_invoke + 48
7 Pomelo 0x462b03 CLSExceptionRecord (CLSException.mm:206)
8 Pomelo 0x46292d CLSExceptionRecordNSException (CLSException.mm:101)
9 Pomelo 0x46252d CLSTerminateHandler() (CLSException.mm:253)
10 libc++abi.dylib 0x31787de3 std::__terminate(void (*)()) + 78
11 libc++abi.dylib 0x317878af __cxa_rethrow + 102
12 libobjc.A.dylib 0x31e52dd3 objc_exception_rethrow + 42
13 CoreFoundation 0x23ab129d CFRunLoopRunSpecific + 632
14 CoreFoundation 0x23ab1013 CFRunLoopRunInMode + 106
15 GraphicsServices 0x2b390201 GSEventRunModal + 136
16 UIKit 0x27255a59 UIApplicationMain + 1440
17 Pomelo 0xb97d0 main (PMLCategoryDetailsTableViewCell.swift:19)
18 libdyld.dylib 0x323deaaf start + 2

--

Fatal Exception: NSInvalidArgumentException
0 CoreFoundation 0x23ba0fef __exceptionPreprocess
1 libobjc.A.dylib 0x31e52c8b objc_exception_throw
2 CoreFoundation 0x23ba6409 __methodDescriptionForSelector
3 CoreFoundation 0x23ba4327 forwarding
4 CoreFoundation 0x23ad3e78 _CF_forwarding_prep_0
5 Auk 0x8ec244 specialized static RightToLeft.isRightToLeft(UIView) -> Bool (RightToLeft.swift:12)
6 Auk 0x8de654 specialized Auk.createPage(String?) -> AukPage (Auk.swift)
7 Auk 0x8dae68 Auk.show(image : UIImage, accessibilityLabel : String?) -> () (Auk.swift)
8 Pomelo 0x17be10 PMLLandingPageViewController.loadSlideshow() -> () (PMLLandingPageViewController.swift)
9 Pomelo 0x17c040 @objc PMLLandingPageViewController.viewDidLoad() -> () (PMLLandingPageViewController.swift)
10 UIKit 0x271f5b8f -[UIViewController loadViewIfRequired]
11 UIKit 0x271f58fd -[UIViewController view]
12 UIKit 0x274facf1 -[UINavigationController preferredContentSize]
13 UIKit 0x274cf04f -[UIPresentationController preferredContentSizeDidChangeForChildContentContainer:]
14 UIKit 0x274cc9e5 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke
15 UIKit 0x27270a91 _applyBlockToCFArrayCopiedToStack
16 UIKit 0x271eb38f _afterCACommitHandler
17 CoreFoundation 0x23b66fed CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION
18 CoreFoundation 0x23b646ab __CFRunLoopDoObservers
19 CoreFoundation 0x23b64ab3 __CFRunLoopRun
20 CoreFoundation 0x23ab1201 CFRunLoopRunSpecific
21 CoreFoundation 0x23ab1013 CFRunLoopRunInMode
22 GraphicsServices 0x2b390201 GSEventRunModal
23 UIKit 0x27255a59 UIApplicationMain
24 Pomelo 0xb97d0 main (PMLCategoryDetailsTableViewCell.swift:19)
25 libdyld.dylib 0x323deaaf start

#0. Crashed: com.twitter.crashlytics.ios.exception
0 Pomelo 0x464831 CLSProcessRecordAllThreads (CLSProcess.c:376)
1 Pomelo 0x464831 CLSProcessRecordAllThreads (CLSProcess.c:376)
2 Pomelo 0x464723 CLSProcessRecordAllThreads (CLSProcess.c:407)
3 Pomelo 0x458851 CLSHandler (CLSHandler.m:26)
4 Pomelo 0x463113 __CLSExceptionRecord_block_invoke (CLSException.mm:199)
5 libdispatch.dylib 0x323bd2cf _dispatch_client_callout + 22
6 libdispatch.dylib 0x323c4a3d _dispatch_barrier_sync_f_invoke + 48
7 Pomelo 0x462b03 CLSExceptionRecord (CLSException.mm:206)
8 Pomelo 0x46292d CLSExceptionRecordNSException (CLSException.mm:101)
9 Pomelo 0x46252d CLSTerminateHandler() (CLSException.mm:253)
10 libc++abi.dylib 0x31787de3 std::__terminate(void (*)()) + 78
11 libc++abi.dylib 0x317878af __cxa_rethrow + 102
12 libobjc.A.dylib 0x31e52dd3 objc_exception_rethrow + 42
13 CoreFoundation 0x23ab129d CFRunLoopRunSpecific + 632
14 CoreFoundation 0x23ab1013 CFRunLoopRunInMode + 106
15 GraphicsServices 0x2b390201 GSEventRunModal + 136
16 UIKit 0x27255a59 UIApplicationMain + 1440
17 Pomelo 0xb97d0 main (PMLCategoryDetailsTableViewCell.swift:19)
18 libdyld.dylib 0x323deaaf start + 2

#1. com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x32495224 kevent64 + 24
1 libdispatch.dylib 0x323ca0f1 _dispatch_mgr_invoke + 280
2 libdispatch.dylib 0x323bed3b _dispatch_mgr_thread + 38

#2. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#3. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#4. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#5. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#6. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#7. com.apple.NSURLConnectionLoader
0 libsystem_kernel.dylib 0x32495474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3249526d mach_msg + 40
2 CoreFoundation 0x23b66573 __CFRunLoopServiceMachPort + 146
3 CoreFoundation 0x23b64b19 __CFRunLoopRun + 1016
4 CoreFoundation 0x23ab1201 CFRunLoopRunSpecific + 476
5 CoreFoundation 0x23ab1013 CFRunLoopRunInMode + 106
6 CFNetwork 0x2364f7ef +[NSURLConnection(Loader) _resourceLoadLoop:] + 486
7 Foundation 0x248df3bb NSThread__main + 1118
8 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
9 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
10 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#8. com.apple.CFSocket.private
0 libsystem_kernel.dylib 0x324a9080 __select + 20
1 CoreFoundation 0x23b6ad65 __CFSocketManager + 536
2 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
3 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
4 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#9. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#10. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#11. com.twitter.crashlytics.ios.MachExceptionServer
0 libsystem_kernel.dylib 0x32495474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3249526d mach_msg + 40
2 Pomelo 0x4542dd CLSMachExceptionServer (CLSMachException.c:180)
3 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
4 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
5 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#12. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#13. com.google.fira.worker
0 Foundation 0x248109bc +[NSString allocWithZone:] + 43
1 Foundation 0x24810ba7 +[NSString stringWithUTF8String:] + 102
2 Foundation 0x24810ba7 +[NSString stringWithUTF8String:] + 102
3 xCon.dylib 0x6b70d67 m998E77CF980F4E12B5C3F83FCC0AE75D(void*) + 322
4 xCon.dylib 0x6b77d7d wA936C3D535214E1EAB34C1D726AD61F7(char const*, stat*) + 20
5 libsqlite3.dylib 0x321e0a71 (null) + 259476
6 libsqlite3.dylib 0x3214259b (null) + 8390
7 libsqlite3.dylib 0x3214223b (null) + 7526
8 libsqlite3.dylib 0x3218373d (null) + 22364
9 libsqlite3.dylib 0x3218547b (null) + 29850
10 libsqlite3.dylib 0x32171f0d (null) + 29604
11 libsqlite3.dylib 0x3216ad25 sqlite3_step + 444
12 Pomelo 0x498e9d -[FIRASqliteStore executeSQLStatement:error:] + 379988
13 Pomelo 0x497979 -[FIRASqliteStore updateRecord:inTableWithName:columnName:columnValue:error:] + 374576
14 Pomelo 0x4aa333 -[FIRADatabase updateDataType:inTableWithName:columnName:columnValue:error:createDictionaryBlock:] + 450794
15 Pomelo 0x4a0fed -[FIRADatabase updateDailyCounts:error:] + 413092
16 Pomelo 0x4b2a73 __43-[FIRAMeasurement writeEventOnWorkerQueue:]_block_invoke.950 + 485418
17 Pomelo 0x4984db -[FIRASqliteStore performTransaction:] + 377490
18 Pomelo 0x4b1e0d -[FIRAMeasurement writeEventOnWorkerQueue:] + 482244
19 Pomelo 0x4b1833 -[FIRAMeasurement handleEventOnWorkerQueue:] + 480746
20 Pomelo 0x4c0c31 __52-[FIRAScheduler scheduleOnWorkerQueueBlockID:block:]_block_invoke + 543208
21 libdispatch.dylib 0x323bd2e3 _dispatch_call_block_and_release + 10
22 libdispatch.dylib 0x323c5729 _dispatch_queue_drain + 1468
23 libdispatch.dylib 0x323bfaad _dispatch_queue_invoke + 84
24 libdispatch.dylib 0x323c6f9f _dispatch_root_queue_drain + 394
25 libdispatch.dylib 0x323c83c3 _dispatch_worker_thread3 + 94
26 libsystem_pthread.dylib 0x32524dc1 _pthread_wqthread + 668
27 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#14. GAIThread
0 libsystem_kernel.dylib 0x32495474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3249526d mach_msg + 40
2 CoreFoundation 0x23b66573 __CFRunLoopServiceMachPort + 146
3 CoreFoundation 0x23b64b19 __CFRunLoopRun + 1016
4 CoreFoundation 0x23ab1201 CFRunLoopRunSpecific + 476
5 CoreFoundation 0x23ab1013 CFRunLoopRunInMode + 106
6 Foundation 0x2481a13d -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 264
7 Foundation 0x24868225 -[NSRunLoop(NSRunLoop) run] + 80
8 Pomelo 0x36917d +[GAI threadMain:] (GAI.m:241)
9 Foundation 0x248df3bb NSThread__main + 1118
10 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
11 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
12 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#15. com.apple.coremedia.player.async
0 libsystem_kernel.dylib 0x324954c4 semaphore_wait_trap + 8
1 libdispatch.dylib 0x323c85df _dispatch_semaphore_wait_slow + 190
2 MediaToolbox 0x255ef487 fpa_AsyncMovieControlThread + 1966
3 CoreMedia 0x24310e13 figThreadMain + 186
4 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
5 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
6 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#16. AVAudioSession Notify Thread
0 libsystem_kernel.dylib 0x32495474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3249526d mach_msg + 40
2 CoreFoundation 0x23b66573 __CFRunLoopServiceMachPort + 146
3 CoreFoundation 0x23b64b19 __CFRunLoopRun + 1016
4 CoreFoundation 0x23ab1201 CFRunLoopRunSpecific + 476
5 CoreFoundation 0x23ab1013 CFRunLoopRunInMode + 106
6 libAVFAudio.dylib 0x2279ef17 GenericRunLoopThread::Entry(void*) + 134
7 libAVFAudio.dylib 0x22791433 CAPThread::Entry(CAPThread*) + 194
8 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
9 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
10 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#17. com.apple.coremedia.player.remote
0 libsystem_kernel.dylib 0x32495474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3249526d mach_msg + 40
2 MediaToolbox 0x255f5689 FigExpressNotificationThread + 88
3 CoreMedia 0x24310e13 figThreadMain + 186
4 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
5 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
6 libsystem_pthread.dylib 0x32524b20 thread_start + 8

#18. Thread
0 libsystem_kernel.dylib 0x324a99c0 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x32524e3d _pthread_wqthread + 792
2 libsystem_pthread.dylib 0x32524b14 start_wqthread + 8

#19. AFNetworking
0 libsystem_kernel.dylib 0x32495474 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3249526d mach_msg + 40
2 CoreFoundation 0x23b66573 __CFRunLoopServiceMachPort + 146
3 CoreFoundation 0x23b64b19 __CFRunLoopRun + 1016
4 CoreFoundation 0x23ab1201 CFRunLoopRunSpecific + 476
5 CoreFoundation 0x23ab1013 CFRunLoopRunInMode + 106
6 Foundation 0x2481a13d -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 264
7 Foundation 0x24868225 -[NSRunLoop(NSRunLoop) run] + 80
8 LoopBack 0xbb0605 +[SLAFURLConnectionOperation networkRequestThreadEntryPoint:] (SLAFURLConnectionOperation.m:193)
9 Foundation 0x248df3bb NSThread__main + 1118
10 libsystem_pthread.dylib 0x32526e23 _pthread_body + 138
11 libsystem_pthread.dylib 0x32526d97 _pthread_start + 118
12 libsystem_pthread.dylib 0x32524b20 thread_start + 8

[evgenyneu]

Thank you for the information. It does look like it is crashing there with NSInvalidArgumentException, very weird. I have no idea what's going on. Let me know if you find out.