iOS 6.12.0 sdk crash requesting interstitial

[jheard]

I am using the 6.12.0 sdk in an app compiled with Xcode 6.0.1. I am getting the following crash right after I request an interstitial. This crash is happening on iOS 6, 7 and 8 on iPhones and iPads. Right now the crash rate is fairly low, but this app update was just released and the rate is slowly increasing.

Fatal Exception: NSGenericException

*** Collection <CALayerArray: 0x188fa420> was mutated while being enumerated.

Thread : Fatal Exception: NSGenericException

0  CoreFoundation                 0x2e1caecb __exceptionPreprocess + 130

1  libobjc.A.dylib                0x38965ce7 objc_exception_throw + 38

2  CoreFoundation                 0x2e1ca9b9 -[NSException name]

3  UIKit                          0x309f791b -[UIView(Hierarchy) subviews] + 302

4  SolitaireFree                  0x002c6688 DumpViews

5  SolitaireFree                  0x002c674c DumpViews

6  SolitaireFree                  0x002c674c DumpViews

7  SolitaireFree                  0x002c674c DumpViews

8  SolitaireFree                  0x002c674c DumpViews

9  SolitaireFree                  0x002c674c DumpViews

10 SolitaireFree                  0x002c68d4 DumpViews

11 SolitaireFree                  0x002c5e2c GetWalkViews

12 SolitaireFree                  0x002c8c9c GetAdVisibility

13 SolitaireFree                  0x002ca078 GatherSignals

14 SolitaireFree                  0x002ca5bc gad_gmrs

15 SolitaireFree                  0x0028b880 -[GADRequest parameters]

16 SolitaireFree                  0x0029069c -[GADSlot(GADSDKCoreControllerDelegate) requestParameters]

17 SolitaireFree                  0x00264a58 __60-[GADSDKCoreController asynchronouslyRequestURLForDelegate:]_block_invoke

18 libdispatch.dylib              0x38e4ed53 _dispatch_call_block_and_release + 10

19 libdispatch.dylib              0x38e53cbd _dispatch_queue_drain + 488

20 libdispatch.dylib              0x38e50c6f _dispatch_queue_invoke + 42

21 libdispatch.dylib              0x38e545f1 _dispatch_root_queue_drain + 76

22 libdispatch.dylib              0x38e548dd _dispatch_worker_thread2 + 56

23 libsystem_pthread.dylib        0x38f7fc17 _pthread_wqthread + 298

24 libsystem_pthread.dylib        0x38f7fadc start_wqthread + 8

[Eric Leichtenschlag]

Thanks John. We've received another report of this recently as well, so I'm bumping up the priority on this crash.

Thanks,

Eric

[Eric Leichtenschlag]

This issue is addressed in the 6.12.2 release. You can grab the update from https://developers.google.com/mobile-ads-sdk/download.

Thanks,

Eric