EXC_BREAKPOINT randomly using NSOutputStream

I am writing an application that uses NSOutputStream. I start the connection like this:

delegate = self;
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;

CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)url,port, &readStream, &writeStream);
CFReadStreamSetProperty(readStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);
CFWriteStreamSetProperty(writeStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);

inputStream = (__bridge_transfer NSInputStream *)readStream;
outputStream = (__bridge_transfer NSOutputStream *)writeStream;

[inputStream setDelegate:delegate];
[outputStream setDelegate:delegate];

loop = [NSRunLoop currentRunLoop];
[inputStream scheduleInRunLoop:loop forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:loop forMode:NSDefaultRunLoopMode];

[inputStream setProperty:NSStreamSocketSecurityLevelTLSv1 forKey:NSStreamSocketSecurityLevelKey];
[outputStream setProperty:NSStreamSocketSecurityLevelTLSv1 forKey:NSStreamSocketSecurityLevelKey];



[inputStream setProperty:NSStreamSocketSecurityLevelNegotiatedSSL
                  forKey:NSStreamSocketSecurityLevelKey];
[outputStream setProperty:NSStreamSocketSecurityLevelNegotiatedSSL
                   forKey:NSStreamSocketSecurityLevelKey];

NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys:
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
                          [NSNumber numberWithBool:NO], kCFStreamSSLValidatesCertificateChain,
                          kCFNull,kCFStreamSSLPeerName,
                          nil];

CFReadStreamSetProperty((CFReadStreamRef)inputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);
CFWriteStreamSetProperty((CFWriteStreamRef)outputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);

[outputStream open];
[inputStream open];

[self sendVersionOrWait];
[loop run];

      

        
        
        
      

    

and then some of the actions depend on the NSStreamDelegate methods. Closing a connector is done by:

 [inputStream close];
[outputStream close];
[inputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream setDelegate:nil];
[outputStream setDelegate:nil];

inputStream = nil;
outputStream = nil;

      

        
        
        
      

    

Sometimes (accidentally) I get EXC_BREAKPOINT and the application crashes. This is part of the crash log:

Exception type: EXC_BREAKPOINT (SIGTRAP) Exception codes: 0x0000000000000001, 0x000000000000defe Subject trigger: 5

Topic name 5: Send Queue: com.apple.root.default-qos

Topic 5 Failure:

0 CoreFoundation 0x22767e22 CFHash + 130

1 CoreFoundation 0x22768d70 CFBasicHashGetCountOfKey + 1152

2 CoreFoundation 0x227688aa CFSetContainsValue + 98

3 CoreFoundation 0x2279ca5a CFRunLoopRemoveSource + 226

4 CFNetwork 0x22343eca SocketStream :: write (__ CFWriteStream *, unsigned char const *, long, CFStreamError *) + 426

5 CFNetwork 0x223480c2 WriteStreamCallbacks :: _ write (__ CFWriteStream *, unsigned char const *, long, CFStreamError *, void *) + 34

6 CoreFoundation 0x2278d7ec CFWriteStreamWrite + 356

7 App 0x000a0190 - [AppMenuViewController sendVersion] (AppMenuViewController.m: 763)

8 App 0x000a0c68 - [AppMenuViewController sendVersionOrWait] (AppMenuViewController.m: 832)

9 Foundation 0x235655e4 __NSFireDelayedPerform + 464

10 CoreFoundation 0x22828734 CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION + 12

11 CoreFoundation 0x228282b4 __CFRunLoopDoTimer + 652

12 CoreFoundation 0x2282651e __CFRunLoopRun + 1414

13 CoreFoundation 0x22773dac CFRunLoopRunSpecific + 472

14 CoreFoundation 0x22773bbe CFRunLoopRunInMode + 102

15 Foundation 0x234ab16c - [NSRunLoop (NSRunLoop) runMode: beforeDate:] + 260

16 Foundation 0x234f95e0 - [NSRunLoop (NSRunLoop) run] + 76

17 App 0x0009feaa - [AppMenuViewController initConnection: withPort:] (AppMenuViewController.m: 749)

18 Application 0x000a1642 - [AppMenuViewController stream: handleEvent:] (AppMenuViewController.m: 952)

19 CoreFoundation 0x227d9b94 _signalEventSync + 144

20 CoreFoundation 0x227e3ef2 _cfstream_solo_signalEventSync + 198

21 CoreFoundation 0x227d981e _CFStreamSignalEvent + 322

22 CFNetwork 0x222b7bd4 SocketStream :: dispatchSignalFromSocketCallbackUnlocked (SocketStreamSignalHolder *) +36

23 CFNetwork 0x222b78be SocketStream :: socketCallback (__ CFSocket *, unsigned long, __CFData const *, void const *) + 146

24 CFNetwork 0x222b77f2 SocketStream :: _ SocketCallBack_stream (__ CFSocket *, unsigned long, __CFData const *, void const *, void *) + 54

25 CoreFoundation 0x2282b0bc __CFSocketPerformV0 + 552

26 CoreFoundation 0x22828804 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 12

27 CoreFoundation 0x22827c16 __CFRunLoopDoSources0 + 218

28 CoreFoundation 0x22826294 __CFRunLoopRun + 764

29 CoreFoundation 0x22773dac CFRunLoopRunSpecific + 472

30 CoreFoundation 0x22773bbe CFRunLoopRunInMode + 102

31 Foundation 0x234ab16c - [NSRunLoop (NSRunLoop) runMode: beforeDate:] + 260

32 Foundation 0x234f95e0 - [NSRunLoop (NSRunLoop) run] + 76

33 App 0x0009feaa - [AppMenuViewController initConnection: withPort:] (AppMenuViewController.m: 749)

34 Application 0x0009b664 __58- [AppMenuViewController alertView: clickedButtonAtIndex:] _ block_invoke (AppMenuViewController.m: 385)

35 libdispatch.dylib 0x30521610 _dispatch_call_block_and_release + 8

36 libdispatch.dylib 0x3052d350 _dispatch_root_queue_drain + 816

37 libdispatch.dylib 0x3052e27a _dispatch_worker_thread3 + 102

38 libsystem_pthread.dylib 0x3069ee22 _pthread_wqthread + 666

39 libsystem_pthread.dylib 0x3069eb74 start_wqthread + 4

I suppose this could be caused by network problems because it appears when my WIFI router has no internet connection. But I'm not sure and I don't know how to remove this error. Please, help:)