Help! IOS crash in mono.

this is log message

0 yusongandmomosang 0x0182d644 mono_type_get_desc + 16
1 yusongandmomosang 0x0182dcc8 mono_type_full_name + 40
2 yusongandmomosang 0x0182e348 mono_method_full_name + 32
3 yusongandmomosang 0x01883b5c mono_debug_print_stack_frame + 32
4 yusongandmomosang 0x017f5be4 print_stack_frame + 44
5 yusongandmomosang 0x017f6b84 mono_jit_walk_stack_from_ctx + 364
6 yusongandmomosang 0x017f7e74 mono_handle_native_sigsegv + 204
7 yusongandmomosang 0x0181463c sigabrt_signal_handler + 104
8 libsystem_c.dylib 0x33a80e90 _sigtramp + 40
9 libsystem_c.dylib 0x33a7711e pthread_kill + 54
10 libsystem_c.dylib 0x33ab396e abort + 90
11 libc++abi.dylib 0x31494d4a abort_message + 70
12 libc++abi.dylib 0x31491ff4 default_terminate() + 20
13 libobjc.A.dylib 0x322dea74 _objc_terminate() + 144
14 libc++abi.dylib 0x31492078 safe_handler_caller(void (*)()) + 76
15 libc++abi.dylib 0x31492110 std::terminate() + 16
16 libc++abi.dylib 0x31493594 __cxa_rethrow + 84
17 libobjc.A.dylib 0x322de9cc objc_exception_rethrow + 8
18 CoreFoundation 0x31366f1c CFRunLoopRunSpecific + 452
19 CoreFoundation 0x31366d44 CFRunLoopRunInMode + 100
20 GraphicsServices 0x391642e6 GSEventRunModal + 70
21 UIKit 0x38c222f4 UIApplicationMain + 1116
22 yusongandmomosang 0x000569f8 main (main.mm:28)
23 yusongandmomosang 0x00056944 start + 36

what does this mean?

 

oh thanks ~