frequent crash when start app

here is the stack

Hardware Model: iPhone5,4

OS Version: iPhone OS 8.1.2 (12B440)

Kernel version: Darwin Kernel Version 14.0.0: Mon Nov 3 22:24:05 PST 2014; root:xnu-2783.3.22~1/RELEASE_ARM_S5L8950X

Thread 1Queue : com.apple.main-thread (serial)

#0 0x367dcf46 in objc_msgSend ()

#1 0x28f12984 in CFStringCreateMutableCopy ()

#2 0x29013458 in extractQuadrupleFromPathIfPossible ()

#3 0x29013cd6 in +[CFPrefsSource withSourceForIdentifier:user:byHost:container:perform:] ()

#4 0x28f4fc18 in _CFXPreferencesCopyDictionaryForSourceWithBundleID ()

#5 0x29c34c24 in -[NSUserDefaults(NSUserDefaults) persistentDomainForName:] ()

#6 0x2c4fc654 in UIApplicationInitialize ()

#7 0x2c4fbb0a in UIApplicationMain ()

#8 0x000cccd2 in main at /Users/wangjianglei/Documents/workspace/Trunk/iOS/TangClient_iOS/TangClient/main.m:13

#9 0x36d50aae in start ()

Thread 2Queue : com.apple.libdispatch-manager (serial)

#0 0x36e032a0 in kevent64 ()

#1 0x03162678 in _dispatch_mgr_invoke ()

#2 0x0315749a in _dispatch_mgr_thread ()

Thread 3#0 0x36e179cc in __workq_kernreturn ()

#1 0x36e91eac in _pthread_wqthread ()

#2 0x36e91b84 in start_wqthread ()

Thread 4#0 0x36e179cc in __workq_kernreturn ()

#1 0x36e91eac in _pthread_wqthread ()

#2 0x36e91b84 in start_wqthread ()

Thread 5#0 0x36e179cc in __workq_kernreturn ()

#1 0x36e91eac in _pthread_wqthread ()

#2 0x36e91b84 in start_wqthread ()