iPhone 6 [iOS版本：8.4]设备上的iOS应用程序崩溃，异常EXC_BAD_ACCESS（SIGSEGV）

Question

iOS 6应用程序崩溃iPhone 6 [iOS版本：8.4]设备有异常

EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x00000008a8302b7f , but its working in iPhone 6 simulator and other apple devices with same os version:
Hardware Model:      iPhone7,2
Process:             digitalAGENCY [1056]
Path:                /private/var/mobile/Containers/Bundle/Application/8F3C89F0-98DB-45F9-94BB-FE80E9DECE3F/digitalAGENCY.app/digitalAGENCY
Identifier:          com.evero.services
Version:             3.3 (3.3)
Code Type:           ARM-64 (Native)
Parent Process:      launchd [1]
Date/Time:           2015-07-22 10:45:49.352 -0400
Launch Time:         2015-07-22 10:45:07.207 -0400
OS Version:          iOS 8.4 (12H143)
Report Version:      105
Exception Type:  EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x00000008a8302b7f Triggered by Thread:  0