ios crash after updating to unity5

2 0x000000010064db44 _ZNK10FileSystem10ToAbsoluteEPKc + 56
1 2 0x000000010065f174 _Z18IsDirectoryCreatedRKNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE + 64
2 2 0x00000001005ac678 _ZN5Cache22ReadCacheIndexThreadedEPv + 160
3 2 0x000000010064c308 _ZN6Thread16RunThreadWrapperEPv + 60
4 libsystem_pthread.dylib 0x00000001998c41b0 _pthread_body + 164
5 libsystem_pthread.dylib 0x00000001998c4108 _pthread_start + 136
6 libsystem_pthread.dylib 0x00000001998c17b0 thread_start + 0
Hide 41 other threads

Thread 1

0 libc++.1.dylib 0x00000001989e7060 std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__grow_by_and_replace() + 280
1 libc++.1.dylib 0x00000001989e6630 std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::assign() + 108
2 libc++.1.dylib 0x00000001989e63f4 std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >:perator=() + 60
3 2 0x0000000100424ecc _ZN33AssetBundleLoadFromAsyncOperation21InitializeAssetBundleERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE + 304
4 2 0x0000000100424984 _ZN33AssetBundleLoadFromAsyncOperation33TryToLoadAndInitializeAssetBundleEv + 836
5 2 0x00000001005fad20 _ZN14PreloadManager26UpdatePreloadingSingleStepENS_21UpdatePreloadingFlagsEi + 252
6 2 0x00000001005fb244 _ZN14PreloadManager16UpdatePreloadingEv + 248
7 2 0x00000001005b7744 _Z10PlayerLoopbbP10IHookEvent + 416
8 2 0x000000010097f0dc _ZL19UnityPlayerLoopImplb + 16
9 2 0x000000010006a310 UnityRepaint + 324
10 2 0x0000000100075d68 -[UnityView recreateGLESSurface] + 756
11 2 0x0000000100075a58 -[UnityView recreateGLESSurfaceIfNeeded] + 268
12 2 0x000000010006a1a4 -[UnityAppController(Rendering) repaint] + 52
13 2 0x00000001000796ec -[UnityAppController(ViewHandling) showGameUI] + 208
14 2 0x0000000100076360 -[UnityAppController startUnity:] + 272
15 Foundation 0x000000018d994614 __NSFireDelayedPerform + 388
16 CoreFoundation 0x000000018cde768c __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 24
17 CoreFoundation 0x000000018cde72fc __CFRunLoopDoTimer + 800
18 CoreFoundation 0x000000018cde5024 __CFRunLoopRun + 1320
19 CoreFoundation 0x000000018cd25b38 CFRunLoopRunSpecific + 448
20 GraphicsServices 0x00000001926f7830 GSEventRunModal + 164
21 UIKit 0x000000018fd640e8 UIApplicationMain + 1152
22 2 0x000000010008fd6c UnityXamarinMain + 460
23 2 0x0000000100e545c4 wrapper_managed_to_native_Unity_XamarinApp_UnityXamarinMain_int_string___string + 304
24 2 0x0000000100e54bf0 2_Unity_XamarinApp_Main_string__ + 44
25 2 0x0000000100eb57e4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 240
26 2 0x0000000101bb4fa4 mono_jit_runtime_invoke + 1276
27 2 0x0000000101c087fc mono_runtime_invoke + 120
28 2 0x0000000101c0cad4 mono_runtime_exec_main + 396
29 2 0x0000000101c85b0c xamarin_main + 1460
30 2 0x0000000101b1087c main + 92
31 libdyld.dylib 0x0000000199747aa0 start + 0