SDKBox Play crash when backgrounding app (iOS13)

Services 3rd-Party
#1

We’re seeing a fairly regular crash exclusive to iOS 13 which is reproduceable as follows

  • Launch app (iOS)
  • background app before the ‘welcome back x’ game center banner shows
  • return to app
  • observe that app has crashed

While it is not a critical issue, it does skew analytics as a large amount of users are triggering the crash and we hope it can be fixed soon. The issue appears to lie in

-[GKNotificationBannerViewController supportedInterfaceOrientations]

with the following stack trace

*** -[__NSArrayM objectAtIndexedSubscript:]: index 0 beyond bounds for empty array


Fatal Exception: NSRangeException
0  CoreFoundation                 0x1a271898c __exceptionPreprocess
1  libobjc.A.dylib                0x1a24410a4 objc_exception_throw
2  CoreFoundation                 0x1a276e3f8 -[__NSCFString characterAtIndex:].cold.1
3  CoreFoundation                 0x1a2602c6c -[__NSArrayM objectAtIndexedSubscript:]
4  GameCenterUI                   0x1c25192e0 -[GKNotificationBannerViewController supportedInterfaceOrientations]
5  UIKitCore                      0x1a6133810 -[UIViewController __supportedInterfaceOrientations]
6  UIKitCore                      0x1a6124c40 -[UIViewController _preferredInterfaceOrientationGivenStatusBarAndDeviceAndOrientation:]
7  UIKitCore                      0x1a67650e8 -[UIWindow _updateToInterfaceOrientation:duration:force:]
8  CoreFoundation                 0x1a267409c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__
9  CoreFoundation                 0x1a26740e4 ___CFXRegistrationPost1_block_invoke
10 CoreFoundation                 0x1a2673444 _CFXRegistrationPost1
11 CoreFoundation                 0x1a26730fc ___CFXNotificationPost_block_invoke
12 CoreFoundation                 0x1a25ef43c -[_CFXNotificationRegistrar find:object:observer:enumerator:]
13 CoreFoundation                 0x1a2672a4c _CFXNotificationPost
14 Foundation                     0x1a29cf2d8 -[NSNotificationCenter postNotificationName:object:userInfo:]
15 UIKitCore                      0x1a671ba54 -[UIApplication _stopDeactivatingForReason:]
16 UIKitCore                      0x1a5f00ddc -[_UISceneLifecycleMultiplexer _performBlock:withApplicationOfDeactivationReasons:fromReasons:]
17 UIKitCore                      0x1a5f01124 -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:]
18 UIKitCore                      0x1a5f009e0 -[_UISceneLifecycleMultiplexer uiScene:transitionedFromState:withTransitionContext:]
19 UIKitCore                      0x1a5d75610 -[UIScene _invalidate]
20 UIKitCore                      0x1a694eec4 -[UIWindowScene _invalidate]
21 UIKitCore                      0x1a6722b20 -[UIApplication workspace:willDestroyScene:withTransitionContext:completion:]
22 UIKitCore                      0x1a62e4c10 -[UIApplicationSceneClientAgent scene:willInvalidateWithEvent:completion:]
23 FrontBoardServices             0x1a77b1bdc -[FBSSceneImpl _callOutQueue_agent_willDestroyWithTransitionContext:completion:]
24 FrontBoardServices             0x1a77d7b70 __84-[FBSWorkspaceScenesClient _queue_invalidateScene:withTransitionContext:completion:]_block_invoke_2
25 FrontBoardServices             0x1a77bc0f8 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:]
26 FrontBoardServices             0x1a77d79e8 __84-[FBSWorkspaceScenesClient _queue_invalidateScene:withTransitionContext:completion:]_block_invoke
27 libdispatch.dylib              0x1a23e6184 _dispatch_client_callout
28 libdispatch.dylib              0x1a238f038 _dispatch_block_invoke_direct$VARIANT$mp
29 FrontBoardServices             0x1a77fb540 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__
30 FrontBoardServices             0x1a77fb20c -[FBSSerialQueue _queue_performNextIfPossible]
31 FrontBoardServices             0x1a77fb734 -[FBSSerialQueue _performNextFromRunLoopSource]
32 CoreFoundation                 0x1a26967e0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
33 CoreFoundation                 0x1a2696738 __CFRunLoopDoSource0
34 CoreFoundation                 0x1a2695ed0 __CFRunLoopDoSources0
35 CoreFoundation                 0x1a269101c __CFRunLoopRun
36 CoreFoundation                 0x1a26908bc CFRunLoopRunSpecific
37 GraphicsServices               0x1ac4fc328 GSEventRunModal
38 UIKitCore                      0x1a67266d4 UIApplicationMain
39 __appname__                     0x102144c28 main + 6 (main.m:6)
40 libdyld.dylib                  0x1a251b460 start
#2

Thanks for your feedback.
I’ll try to reproduce this issue with your steps.

#3

Hi @yinjimmy , any luck reproducing the issue?

#4

sdkboxplay 2.5.0.5
iphone 6s / iOS 13.1.2
cocos2d-x 3.8.1
xcode 11.1

image
image972×434 30.6 KB

  1. launch app with Xcode
  2. click connect and background app
  3. click app icon to launch app

no crash.

#5

Have you tested with an app that has already connected to game center? You need to background it before the ‘welcome back’ banner displays.
The steps you listed sounds like a first launch.

#6

yes, I have.

#7

Happens a lot, but not sdkbox related, it crashes for me but i use own GameCenter implementation.

shot
shot2750×176 24.4 KB

#8

Hi all!

@Guykun are there any successes with fixing this?

#9

We haven’t looked into it further, it’s a fairly harmless crash however it does hurt analytics.

https://forum.unity.com/threads/crash-on-ios-v13-or-above.775829/
Seems like it’s spreading across games in general, maybe it’s an iOS13 bug?

Let’s keep this thread open as it’s a good Google result for anyone with more information.

#10

@Guykun Thanks for the answer! Yep I think it’s 90% can be iOS13 bug, let’s wait for good wind