State Restoration crash after _saveApplicationPreservationStateIfSupported in keyed archiving EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x000000010bff0000
Originator: | steipete | ||
Number: | rdar://45453895 | Date Originated: | 22-Oct-2018 05:34 PM |
Status: | Open | Resolved: | |
Product: | iOS + SDK | Product Version: | 12.0 |
Classification: | Crash/Hang/Data Loss | Reproducible: | Sometimes |
Summary: We see a crash in state restoration, deep inside keyed archiving. Crashed: com.apple.main-thread 0 libsystem_platform.dylib 0x1e66e2d88 _platform_memmove + 40 1 Foundation 0x1e7466ce4 -[NSConcreteMutableData appendBytes:length:] + 532 2 CoreFoundation 0x1e6a1316c writeBytes + 164 3 CoreFoundation 0x1e6a108b0 _appendObject + 972 4 CoreFoundation 0x1e6a0fea0 __CFBinaryPlistWriteOrPresize + 472 5 Foundation 0x1e7466a30 -[NSKeyedArchiver finishEncoding] + 588 6 UIKitCore 0x2131012dc -[UIApplication(StateRestoration) _saveApplicationPreservationState:viewController:sessionIdentifier:beginHandler:completionHandler:] + 3652 7 UIKitCore 0x2130ffdbc -[UIApplication(StateRestoration) _saveApplicationPreservationStateIfSupported] + 508 8 UIKitCore 0x2130e2c0c -[UIApplication _applicationDidEnterBackground] + 112 9 UIKitCore 0x2139023a4 -[__UICanvasLifecycleMonitor_Compatability deactivateEventsOnly:withContext:forceExit:completion:] + 1848 10 UIKitCore 0x2138c064c __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 852 11 UIKitCore 0x2138c02a8 -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 432 12 UIKitCore 0x213903844 __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 220 13 UIKitCore 0x213904334 _performActionsWithDelayForTransitionContext + 112 14 UIKitCore 0x2139036fc -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 248 15 UIKitCore 0x2138fca10 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 368 16 UIKitCore 0x213109940 -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 468 17 FrontBoardServices 0x1e95085a0 __80-[FBSSceneImpl updater:didUpdateSettings:withDiff:transitionContext:completion:]_block_invoke.359 + 228 18 libdispatch.dylib 0x1e6510484 _dispatch_client_callout + 16 19 libdispatch.dylib 0x1e64b3e58 _dispatch_block_invoke_direct$VARIANT$mp + 224 20 FrontBoardServices 0x1e9546640 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 40 21 FrontBoardServices 0x1e95462cc -[FBSSerialQueue _performNext] + 416 22 FrontBoardServices 0x1e95468e8 -[FBSSerialQueue _performNextFromRunLoopSource] + 56 23 CoreFoundation 0x1e6a665b8 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 24 CoreFoundation 0x1e6a66538 __CFRunLoopDoSource0 + 88 25 CoreFoundation 0x1e6a65e1c __CFRunLoopDoSources0 + 176 26 CoreFoundation 0x1e6a60ce8 __CFRunLoopRun + 1040 27 CoreFoundation 0x1e6a605b8 CFRunLoopRunSpecific + 436 28 GraphicsServices 0x1e8cd4584 GSEventRunModal + 100 29 UIKitCore 0x2130db558 UIApplicationMain + 212 30 Viewer 0x1025cb294 main (main.swift:12) 31 libdyld.dylib 0x1e6520b94 start + 4 I have no way to trigger this locally, but it is happening many months now, both iOS 11 and 12, and affecting many customers on PDF Viewer Pro. Steps to Reproduce: Use http://pdfviewer.io. Background app. Observe rare crashes. They are hard to notice because the app just restarts afterwards, losing state. We believe this is a corruption issue in UIKit itself - I cannot imagine how we could trigger a crash on exactly this position, over thousands of users. Expected Results: No crash :) Actual Results: crash. Version: 12.0 Notes: Sorry for not being able to offer more infos - if you have ideas what would be useful to add, let me know. Specific device here was Device Model: iPad 6 Orientation: Face Up RAM free: 173.38 MB Disk free: 3.02 GB Operating System Version: 12.0.0 (16A366) Orientation: Portrait Jailbroken: No Crash Date: Oct 22, 2018, 4:57:00 PM App version: 3.1.0 (6993)
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