Can somebody please help me understand the issue of crash when it is launching:
When iOS prewarms (This is the new IOS 15 feature ) the app after some time and the user launches the app then it is getting crash.
Prewarming Apple documentation: https://developer.apple.com/documentation/uikit/app_and_environment/responding_to_the_launch_of_your_app/about_the_app_launch_sequence#3894431
Incident Identifier: B53F9964-33AC-4E23-B27A-F49BA687B109
CrashReporter Key: a63a0db0a7a8ed7f3ca168880d608ec27a2c598e
Hardware Model: iPhone9,3
Process: KP9 [706]
Path: /private/var/containers/Bundle/Application/7598A335-DB75-4843-934E-48C0B65AAA35/KP9.app/KP9
Identifier: com.test.kk
Version: 2021.3.2 (202112290503)
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: com.test.kk [635]
Date/Time: 2022-01-09 22:16:49.0892 0530
Launch Time: 2022-01-09 16:15:37.0788 0530
OS Version: iPhone OS 15.2 (19C56)
Release Type: User
Baseband Version: 6.01.01
Report Version: 104
Exception Type: EXC_CRASH (SIGKILL)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Reason: FRONTBOARD 2343432205
<RBSTerminateContext| domain:10 code:0x8BADF00D explanation:scene-create watchdog transgression: application<com.test.kk>:706 exhausted CPU time allowance of 4.99 seconds
ProcessVisibility: Foreground
ProcessState: Running
WatchdogEvent: scene-create
WatchdogVisibility: Foreground
WatchdogCPUStatistics: (
"Elapsed total CPU time (seconds): 7.100 (user 7.100, system 0.000), 64% CPU",
"Elapsed application CPU time (seconds): 5.453, 49% CPU"
) reportType:CrashLog maxTerminationResistance:Interactive>
Triggered by Thread: 0
Kernel Triage:
VM - Compressor failed a blocking pager_get
VM - Compressor failed a blocking pager_get
VM - Compressor failed a blocking pager_get
VM - Compressor failed a blocking pager_get
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x1bdec0b10 mach_msg_trap 8
1 libsystem_kernel.dylib 0x1bdec1134 mach_msg 72
2 CoreFoundation 0x183d3fb60 __CFRunLoopServiceMachPort 368
3 CoreFoundation 0x183d43c48 __CFRunLoopRun 1184
4 CoreFoundation 0x183d56e1c CFRunLoopRunSpecific 572
5 Foundation 0x1854903cc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 232
6 Foundation 0x1854cec3c -[NSRunLoop(NSRunLoop) runUntilDate:] 88
7 KP9 0x1030b5988 0x102dd4000 3021192
8 UIKitCore 0x186586888 -[UIApplication(StateRestoration) _restoreApplicationPreservationStateWithSessionIdentifier:beginHandler:completionHandler:] 6136
9 UIKitCore 0x18662f138 -[UIApplication(StateRestoration) _doRestorationIfNecessary] 244
10 UIKitCore 0x1863ab3fc -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] 276
11 UIKitCore 0x186581c7c -[UIApplication _callInitializationDelegatesWithActions:forCanvas:payload:fromOriginatingProcess:] 3456
12 UIKitCore 0x18656aed4 -[UIApplication _runWithMainScene:transitionContext:completion:] 1216
13 UIKitCore 0x1863d7944 -[_UISceneLifecycleMultiplexer completeApplicationLaunchWithFBSScene:transitionContext:] 148
14 UIKitCore 0x18623b9c4 _UIScenePerformActionsWithLifecycleActionMask 96
15 UIKitCore 0x18635fbe0 __101-[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:]_block_invoke 196
16 UIKitCore 0x1864762c4 -[_UISceneLifecycleMultiplexer _performBlock:withApplicationOfDeactivationReasons:fromReasons:] 240
17 UIKitCore 0x1866a1f60 -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:] 732
18 UIKitCore 0x186631ba0 -[_UISceneLifecycleMultiplexer uiScene:transitionedFromState:withTransitionContext:] 336
19 UIKitCore 0x18623c8ac __186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke 188
20 UIKitCore 0x1862f8c4c [BSAnimationSettings(UIKit) tryAnimatingWithSettings:actions:completion:] 812
21 UIKitCore 0x18623e63c _UISceneSettingsDiffActionPerformChangesWithTransitionContext 248
22 UIKitCore 0x186323ebc -[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] 356
23 UIKitCore 0x18677edb8 __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke.576 772
24 UIKitCore 0x18626c910 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] 248
25 UIKitCore 0x1862ae770 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] 264
26 UIKitCore 0x1863dc4dc -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] 548
27 UIKitCore 0x1863222d8 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] 360
28 FrontBoardServices 0x19499baac -[FBSScene _callOutQueue_agent_didCreateWithTransitionContext:completion:] 412
29 FrontBoardServices 0x1949be0cc __94-[FBSWorkspaceScenesClient createWithSceneID:groupID:parameters:transitionContext:completion:]_block_invoke.180 100
30 FrontBoardServices 0x19497e0f0 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] 232
31 FrontBoardServices 0x19497f4f8 __94-[FBSWorkspaceScenesClient createWithSceneID:groupID:parameters:transitionContext:completion:]_block_invoke 312
32 libdispatch.dylib 0x183a971a8 _dispatch_client_callout 16
33 libdispatch.dylib 0x183a39ad0 _dispatch_block_invoke_direct$VARIANT$mp 220
34 FrontBoardServices 0x19497f7d0 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ 40
35 FrontBoardServices 0x19497ecdc -[FBSSerialQueue _targetQueue_performNextIfPossible] 176
36 FrontBoardServices 0x194982e44 -[FBSSerialQueue _performNextFromRunLoopSource] 24
37 CoreFoundation 0x183deb2b0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 24
38 CoreFoundation 0x183dfb2d8 __CFRunLoopDoSource0 204
39 CoreFoundation 0x183d3e678 __CFRunLoopDoSources0 256
40 CoreFoundation 0x183d43aa8 __CFRunLoopRun 768
41 CoreFoundation 0x183d56e1c CFRunLoopRunSpecific 572
42 GraphicsServices 0x1a40d99a0 GSEventRunModal 160
43 UIKitCore 0x18658a600 -[UIApplication _run] 1080
44 UIKitCore 0x18631fb08 UIApplicationMain 2028
45 KP9 0x1030af288 0x102dd4000 2994824
46 dyld 0x103bcc250 start 444
Thread 1:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 2 name: Dispatch queue: com.apple.root.default-qos
Thread 2:
0 libcorecrypto.dylib 0x1a7c5f568 ccsha512_final 264
1 libcorecrypto.dylib 0x1a7c5f4d4 ccsha512_final 116
2 libcorecrypto.dylib 0x1a7c94af0 F 292
3 libcorecrypto.dylib 0x1a7c94950 ccpbkdf2_hmac 356
4 libcommonCrypto.dylib 0x1de1dc2c8 CCKeyDerivationPBKDF 144
5 SQLCipher 0x103f9f9e4 sqlcipher_cc_kdf 188
6 SQLCipher 0x103f9ec68 sqlcipher_cipher_ctx_key_derive 532
7 SQLCipher 0x103f9e988 sqlcipher_codec_key_derive 36
8 SQLCipher 0x103fb1950 sqlite3Codec 56
9 SQLCipher 0x103fb915c readDbPage 252
10 SQLCipher 0x103fb8c10 getPageNormal 432
11 SQLCipher 0x103fbc120 btreeGetPage 48
12 SQLCipher 0x103f9c5e0 sqlite3BtreeBeginTrans 560
13 SQLCipher 0x103fd1a28 sqlite3InitOne 552
14 SQLCipher 0x103fafffc sqlite3Init 76
15 SQLCipher 0x103fdd980 sqlite3ReadSchema 48
16 SQLCipher 0x103fa9b64 sqlite3LocateTable 64
17 SQLCipher 0x104000d04 selectExpander 1040
18 SQLCipher 0x103ff9f80 sqlite3WalkSelect 52
19 SQLCipher 0x1040004d8 sqlite3SelectPrep 132
20 SQLCipher 0x103fe6fb8 sqlite3Select 208
21 SQLCipher 0x103fdf7e0 yy_reduce 2500
22 SQLCipher 0x103fac6dc sqlite3RunParser 604
23 SQLCipher 0x103fda120 sqlite3Prepare 280
24 SQLCipher 0x103fab9dc sqlite3LockAndPrepare 152
25 KP9 0x102df22d4 0x102dd4000 123604
26 KP9 0x102df258c 0x102dd4000 124300
27 KP9 0x102df2ec8 0x102dd4000 126664
28 KP9 0x102df1a7c 0x102dd4000 121468
29 KP9 0x102df7ea4 0x102dd4000 147108
30 KP9 0x102dfe768 0x102dd4000 173928
31 KP9 0x102df3e6c 0x102dd4000 130668
32 KP9 0x102df3ad0 0x102dd4000 129744
33 KP9 0x102f5cf9c 0x102dd4000 1609628
34 KP9 0x102fc544c 0x102dd4000 2036812
35 KP9 0x102fc504c 0x102dd4000 2035788
36 libdispatch.dylib 0x183a961a4 _dispatch_call_block_and_release 24
37 libdispatch.dylib 0x183a971a8 _dispatch_client_callout 16
38 libdispatch.dylib 0x183a391fc _dispatch_queue_override_invoke 728
39 libdispatch.dylib 0x183a4643c _dispatch_root_queue_drain 340
40 libdispatch.dylib 0x183a46c38 _dispatch_worker_thread2 172
41 libsystem_pthread.dylib 0x1de36ee48 _pthread_wqthread 224
42 libsystem_pthread.dylib 0x1de36e9f0 start_wqthread 8
Thread 3:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 4:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 5 name: com.apple.uikit.eventfetch-thread
Thread 5:
0 libsystem_kernel.dylib 0x1bdec0b10 mach_msg_trap 8
1 libsystem_kernel.dylib 0x1bdec1134 mach_msg 72
2 CoreFoundation 0x183d3fb60 __CFRunLoopServiceMachPort 368
3 CoreFoundation 0x183d43c48 __CFRunLoopRun 1184
4 CoreFoundation 0x183d56e1c CFRunLoopRunSpecific 572
5 Foundation 0x1854903cc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 232
6 Foundation 0x1854cec3c -[NSRunLoop(NSRunLoop) runUntilDate:] 88
7 UIKitCore 0x186508348 -[UIEventFetcher threadMain] 512
8 Foundation 0x1854dc8ac __NSThread__start__ 792
9 libsystem_pthread.dylib 0x1de3703a4 _pthread_start 116
10 libsystem_pthread.dylib 0x1de36e9fc thread_start 8
Thread 6:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 7:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 8:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 9 name: com.google.firebase.crashlytics.MachExceptionServer
Thread 9:
0 libsystem_kernel.dylib 0x1bdec0b10 mach_msg_trap 8
1 libsystem_kernel.dylib 0x1bdec1134 mach_msg 72
2 FirebaseCrashlytics 0x1040eb884 FIRCLSMachExceptionServer 104
3 libsystem_pthread.dylib 0x1de3703a4 _pthread_start 116
4 libsystem_pthread.dylib 0x1de36e9fc thread_start 8
Thread 10:
0 libsystem_pthread.dylib 0x1de36e9e8 start_wqthread 0
Thread 11 name: com.apple.NSURLConnectionLoader
Thread 11:
0 libsystem_kernel.dylib 0x1bdec0b10 mach_msg_trap 8
1 libsystem_kernel.dylib 0x1bdec1134 mach_msg 72
2 CoreFoundation 0x183d3fb60 __CFRunLoopServiceMachPort 368
3 CoreFoundation 0x183d43c48 __CFRunLoopRun 1184
4 CoreFoundation 0x183d56e1c CFRunLoopRunSpecific 572
5 CFNetwork 0x18475bc88 0x18450f000 2411656
6 Foundation 0x1854dc8ac __NSThread__start__ 792
7 libsystem_pthread.dylib 0x1de3703a4 _pthread_start 116
8 libsystem_pthread.dylib 0x1de36e9fc thread_start 8
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000010004005 x1: 0x0000000007000806 x2: 0x0000000000000000 x3: 0x0000000000000c00
x4: 0x0000000000002803 x5: 0x00000000ffffffff x6: 0x0000000000000000 x7: 0x0000000281cc8340
x8: 0x00000000fffffbbf x9: 0x0000000007000906 x10: 0x893439334442004e x11: 0x000000b2f280f58a
x12: 0x00000000016e3600 x13: 0x000000000039bd23 x14: 0x0000010000000102 x15: 0x0000000000000001
x16: 0xffffffffffffffe1 x17: 0x0000000000000100 x18: 0x0000000000000000 x19: 0x0000000000000000
x20: 0x00000000ffffffff x21: 0x0000000000002803 x22: 0x0000000000000c00 x23: 0x000000016d0280d0
x24: 0x0000000007000806 x25: 0x0000000000000000 x26: 0x0000000007000806 x27: 0x0000000000002803
x28: 0x0000000000002803 fp: 0x000000016d027f50 lr: 0x00000001bdec1134
sp: 0x000000016d027f00 pc: 0x00000001bdec0b10 cpsr: 0x60000000
far: 0x0000000000000000 esr: 0x56000080 Address size fault
Binary Images:
0x1bdec0000 - 0x1bdef1fff libsystem_kernel.dylib arm64 <8f5f208de1bd3eb2994023b6d21843c5> /usr/lib/system/libsystem_kernel.dylib
0x183d39000 - 0x184173fff CoreFoundation arm64 <7a0c7b81a5b636a6b41cc7c790076454> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x185479000 - 0x185759fff Foundation arm64 <534d37b52b793993ab18822606b22abf> /System/Library/Frameworks/Foundation.framework/Foundation
0x102dd4000 - 0x1036ebfff KP9 arm64 <87a5e3db6b5d3f4f87ea42e30a50d814> /private/var/containers/Bundle/Application/7598A335-DB75-4843-934E-48C0B65AAA35/KP9.app/KP9
0x18609e000 - 0x18782dfff UIKitCore arm64 <d8869deee23832848c9a623313659320> /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore
0x194975000 - 0x194a13fff FrontBoardServices arm64 <21a2ad94245d3ba084bba0895e710331> /System/Library/PrivateFrameworks/FrontBoardServices.framework/FrontBoardServices
0x183a33000 - 0x183ab5fff libdispatch.dylib arm64 <a994086b41023d758ac5d3af5de2616d> /usr/lib/system/libdispatch.dylib
0x1a40d8000 - 0x1a40e0fff GraphicsServices arm64 <c88c86b0cde236239477bcd5d3965825> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
0x103bb4000 - 0x103c07fff dyld arm64 <0b12aec1caef38ad8fb73cab3da30489> /usr/lib/dyld
0x1de36a000 - 0x1de37dfff libsystem_pthread.dylib arm64 <263a2eadc4f33ef5bc4b7a61e6698c8b> /usr/lib/system/libsystem_pthread.dylib
0x1a7c55000 - 0x1a7cccfff libcorecrypto.dylib arm64 <913aec2c4e953ac89ec8e3354c4919c1> /usr/lib/system/libcorecrypto.dylib
0x1de1d3000 - 0x1de1dffff libcommonCrypto.dylib arm64 <85e3107272293aecaff28bc0eb8d3266> /usr/lib/system/libcommonCrypto.dylib
0x103f94000 - 0x104073fff SQLCipher arm64 <fff1c8a664e339a4b9aa9a80ba8836c7> /private/var/containers/Bundle/Application/7598A335-DB75-4843-934E-48C0B65AAA35/KP9.app/Frameworks/SQLCipher.framework/SQLCipher
0x1040d4000 - 0x10410ffff FirebaseCrashlytics arm64 <929f2f341b383885ab26364c8fee25d3> /private/var/containers/Bundle/Application/7598A335-DB75-4843-934E-48C0B65AAA35/KP9.app/Frameworks/FirebaseCrashlytics.framework/FirebaseCrashlytics
0x18450f000 - 0x1849a5fff CFNetwork arm64 <9ec6c90340d733f1bf3a06f57c3a4c15> /System/Library/Frameworks/CFNetwork.framework/CFNetwork
EOF
CodePudding user response：
In iOS there is something called the app WatchDog. In order to make sure that iOS doesn’t crash or become unresponsive it will kill any apps that are taking too long to respond.
This mostly happens if an app takes too long to launch. If you’re doing too much in the start up of the app this can happen.
It can be recognised by the funny error code of 0x8BADF00D. Read aloud as “ate bad food”