How to solve an iOS crash without app call stack?

Our app is crash online, not in debug mode.

We cannot reproduce the crash.

Here is the crash log which caught with bugly.

Anyone could help or some clue , Please!

#43 Thread

SIGSEGV

SEGV_ACCERR

0 libobjc.A.dylib   objc_msgSend + 16
1 CoreFoundation    ___CFPropertyListIsValidAux + 56
2 CoreFoundation    ___CFPropertyListIsDictPlistAux + 188
3 CoreFoundation    ___CFDictionaryApplyFunction_block_invoke + 24
4 CoreFoundation    _CFBasicHashApply + 132
5 CoreFoundation    CFDictionaryApplyFunction + 180
6 CoreFoundation    ___CFPropertyListIsValidAux + 388
7 CoreFoundation    CFPropertyListIsValid + 28
8 CFNetwork ___ZN12__CFURLCache23CreateAndStoreCacheNodeEP16__CFURLCacheNodePK20_CFCachedURLResponsePK10__CFStringPK13_CFURLRequestPKvbRb_block_invoke + 148
9 libdispatch.dylib __dispatch_call_block_and_release + 24
10 libdispatch.dylib    __dispatch_client_callout + 16
11 libdispatch.dylib    __dispatch_lane_serial_drain$VARIANT$mp + 592
12 libdispatch.dylib    __dispatch_lane_invoke$VARIANT$mp + 432
13 libdispatch.dylib    __dispatch_workloop_worker_thread + 600
14 libsystem_pthread.dylib  _pthread_wqthread + 312

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