我有一个iOS应用程序正在制作中，并收到了以下Bugsnag异常，我无法重新创建。任何人都可以帮助我理解这里发生了什么，因为附加的堆栈跟踪并没有帮助我确定它的确切来源。
EXC_BAD_ACCESS Attempted to dereference garbage pointer 0xed03a.
/usr/lib/system/libdispatch.dylib _dispatch_dispose
/usr/lib/system/libdispatch.dylib -[OS_dispatch_object _xref_dispose]
/usr/lib/system/libdispatch.dylib __destroy_helper_block_
/usr/lib/system/libsystem_blocks.dylib _Block_release
Frameworks/CoreFoundation.framework/CoreFoundation __CFArrayReleaseValues
Frameworks/CoreFoundation.framework/CoreFoundation CFRelease
Frameworks/CFNetwork.framework/CFNetwork _ZN19RunloopBlockContext7performEv
Frameworks/CFNetwork.framework/CFNetwork _ZN17MultiplexerSource7performEv
Frameworks/CFNetwork.framework/CFNetwork _ZN17MultiplexerSource8_performEPv
Frameworks/CoreFoundation.framework/CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
Frameworks/CoreFoundation.framework/CoreFoundation __CFRunLoopDoSources0
Frameworks/CoreFoundation.framework/CoreFoundation __CFRunLoopRun
Frameworks/CoreFoundation.framework/CoreFoundation CFRunLoopRunSpecific
Frameworks/CFNetwork.framework/CFNetwork +[NSURLConnection(Loader) _resourceLoadLoop:]
Frameworks/Foundation.framework/Foundation __NSThread__start__
/usr/lib/system/libsystem_pthread.dylib _pthread_body
/usr/lib/system/libsystem_pthread.dylib _pthread_start