Crash By CFNetwork In iOS13

Question

Created Jun ’22

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There Many Crash Report Like this, But no any code about my business can tell me why, so I think this is a system bug, Who can tell me why and how to avoid it?

Thread 19 Crashed:
0   CoreFoundation                  __exceptionPreprocess  +224
1   libobjc.A.dylib                 objc_exception_throw  +56
2   CoreFoundation                  -[__NSSingleObjectEnumerator initWithObject:collection:]  +0
3   CFNetwork                       _CFHTTPServerResponseEnqueue  +24424
4   CFNetwork                       _CFHTTPServerResponseEnqueue  +22476
5   CFNetwork                       _CFHTTPServerResponseEnqueue  +31004
6   CFNetwork                       _CFHTTPMessageSetResponseProxyURL  +8652
7   CFNetwork                       0x00000001a09a6138 0x1a09a1000 + 20792
8   CFNetwork                       CFURLDownloadCancel  +35396
9   CFNetwork                       CFURLDownloadCancel  +29408
10  CFNetwork                       0x00000001a09aa444 0x1a09a1000 + 37956
11  CFNetwork                       0x00000001a09a7cf0 0x1a09a1000 + 27888
12  CFNetwork                       CFURLDownloadCancel  +41784
13  libdispatch.dylib               _dispatch_block_async_invoke2  +104
14  libdispatch.dylib               _dispatch_client_callout  +16
15  libdispatch.dylib               _dispatch_lane_serial_drain$VARIANT$mp  +608
16  libdispatch.dylib               _dispatch_lane_invoke$VARIANT$mp  +464
17  libdispatch.dylib               _dispatch_workloop_worker_thread  +588
18  libsystem_pthread.dylib         _pthread_wqthread  +272
19  libsystem_pthread.dylib         start_wqthread  +8

I have sent the crash file here, that i removed some information about my app

crash.crash

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Answer 1

Jerrydu OP

Jul ’22

this crash only occur in iOS13.1.3～13.5.1, But I didn't see any change about CFNetwork here

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Answer 2

Jerrydu OP

Jul ’22

App May Execute this code many times, May this is the problem about this crash?

NSURL *url = [NSURL URLWithString:hostString];
  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
  [request setAllHTTPHeaderFields:header];
   
  NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
  sessionConfiguration.timeoutIntervalForRequest = MAXFLOAT;
  self.session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:_operationQueue];
  NSURLSessionWebSocketTask *webSocketTask = [self.session webSocketTaskWithRequest:request];

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