ios - Crash in NRMANSURLConnectionSupport -

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i keep getting following crash log in new relic board. not able replicate bug. issue affects maybe more half of users. has else faced similar issue or know how fix it?

hardware model:      iphone 6 (iphone7,2)  process:         t_app [1421]  code type:       arm64  parent process:  launchd [1]    date/time:       2015-07-22 01:09:04 +0000  launch time:     2015-07-22 01:09:04 +0000  os version:      ios 8.1.2 (12b440)    exception type:  sigsegv  crashed thread:  14    application specific information:  *** terminating app due uncaught exception 'sigsegv', reason: ''    thread 14 crashed:  0   cfnetwork                     0x187e41030 __zn11httpmessage20ensureparserfinishedev + 69680  1   cfnetwork                     0x187e40fb8 __zn11httpmessage19copyallheaderfieldseppk9__cfarray + 69560  2   cfnetwork                     0x187e766d4 [nshttpurlresponse allheaderfields] + 288468  3   t_app                         0x10006b22c [nrmansurlconnectionsupport noticeresponse:forrequest:withtimer:andbody:bytessent:bytesreceived:] (nrmansurlconnectionsupport.m:341)  4   t_app                         0x100097fe0 [nrmansurlconnectiondelegatebase connectiondidfinishloading:] (nrmansurlconnectiondelegatebase.m:126)  5   cfnetwork                     0x187f8ae70 ___65-[nsurlconnectioninternal + 1420912  6   cfnetwork                     0x187f8ae00 [nsurlconnectioninternal _withconnectionanddelegate:onlyactive:] + 1420800  7   cfnetwork                     0x187f8af7c [nsurlconnectioninternal _withactiveconnectionanddelegate:] + 1421180  8   cfnetwork                     0x187f2c3f4 ____zn27urlconnectionclient_classic23_delegate_cachetrifectaepk20_cfcachedurlresponseu13block_pointerfvve_block_invoke + 1033204  9   cfnetwork                     0x187f28540 ____zn27urlconnectionclient_classic18_withdelegateasyncepkcu13block_pointerfvp16_cfurlconnectionpk33cfurlconnectionclientcurrent_vmaxe_block_invoke_2 + 1017152  10  cfnetwork                     0x187e4bb54 __zn19runloopblockcontext13_invoke_blockepkvpv + 113492  11  corefoundation                0x1883c8aac _cfarrayapplyfunction + 35500  12  cfnetwork                     0x187e4ba00 __zn19runloopblockcontext7performev + 113152  13  cfnetwork                     0x187e4b8b4 __zn17multiplexersource7performev + 112820  14  cfnetwork                     0x187e4b6e0 __zn17multiplexersource8_performepv + 112352  15  corefoundation                0x18849e9ec ___cfrunloop_is_calling_out_to_a_source0_perform_function__ + 911852  16  corefoundation                0x18849dc90 ___cfrunloopdosources0 + 908432  17  corefoundation                0x18849bd40 ___cfrunlooprun + 900416  18  corefoundation                0x1883c90a4 _cfrunlooprunspecific + 37028  19  webcore                       0x195f50674 __zn7webcorel15runloaderthreadepv + 935540  20  javascriptcore                0x189950b80 __zn3wtfl19wtfthreadentrypointepv + 84864  21  libsystem_pthread.dylib       0x19945fe80 __pthread_body + 16000  22  libsystem_pthread.dylib       0x19945fddc __pthread_body + 15836  23  libsystem_pthread.dylib       0x19945cfb0 _thread_start + 4016


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