I am using Unity 4.6.6f2 and made il2cpp build to support 64 bit requirement from apple. I am having strange random crash and in device crash logs, I see these crash reports. It is happening on multiple devices and all of them have this in common: Here's the logs:
Code Type: ARM-64 (Native)
Parent Process: launchd [1]
Date/Time: 2015-06-18 12:06:11.292 +0400
Launch Time: 2015-06-18 11:50:59.940 +0400
OS Version: iOS 8.1 (12B410)
Report Version: 105
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x000000000000029c
Triggered by Thread: 36
Thread 36 name: Dispatch queue: com.apple.IOAccelerator.BlockFences
Thread 36 Crashed:
0 libobjc.A.dylib 0x0000000194b739f4 objc_disposeClassPair + 192
1 libobjc.A.dylib 0x0000000194b739bc objc_disposeClassPair + 136
2 libsystem_blocks.dylib 0x000000019520190c _Block_release + 252
3 IOAccelerator 0x000000018d68aca4 ioAccelCommandQueueBlockFenceCallback + 60
4 IOKit 0x00000001851c58cc IODispatchCalloutFromCFMessage + 372
5 IOKit 0x00000001851c596c _IODispatchCalloutWithDispatch + 36
6 libdispatch.dylib 0x00000001951b2a2c dispatch_mig_server + 432
7 libdispatch.dylib 0x00000001951ad368 _dispatch_client_callout + 12
8 libdispatch.dylib 0x00000001951c20c4 _dispatch_source_latch_and_call + 788
9 libdispatch.dylib 0x00000001951af4d0 _dispatch_source_invoke + 284
10 libdispatch.dylib 0x00000001951b72a0 _dispatch_queue_drain + 672
11 libdispatch.dylib 0x00000001951b0470 _dispatch_queue_invoke + 128
12 libdispatch.dylib 0x00000001951b9220 _dispatch_root_queue_drain + 660
13 libdispatch.dylib 0x00000001951ba758 _dispatch_worker_thread3 + 104
14 libsystem_pthread.dylib 0x00000001953892e0 _pthread_wqthread + 812
15 libsystem_pthread.dylib 0x0000000195388fa4 start_wqthread + 0