On my mac OSX snow leopard and xcode 4.1 and the last SDK, My application crash on my phone but on my phone friend it don't crash.
I've got this error, I launch my application, wait RSS feed and after 2/3 seconds it crashed : Thank you for your help....
Date/Time: 2011-10-07 10:15:54.675 +0200
OS Version: iPhone OS 4.3.3 (8J2)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x2040b743
Crashed Thread: 6
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x332a5c00 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x332a5758 mach_msg + 44
2 CoreFoundation 0x329382b8 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x3293a562 __CFRunLoopRun + 350
4 CoreFoundation 0x328caebc CFRunLoopRunSpecific + 224
5 CoreFoundation 0x328cadc4 CFRunLoopRunInMode + 52
6 GraphicsServices 0x33433418 GSEventRunModal + 108
7 GraphicsServices 0x334334c4 GSEventRun + 56
8 UIKit 0x32417d62 -[UIApplication _run] + 398
9 UIKit 0x32415800 UIApplicationMain + 664
Thread 1:
0 libsystem_kernel.dylib 0x332a83ec __workq_kernreturn + 8
1 libsystem_c.dylib 0x32c966d8 _pthread_wqthread + 592
2 libsystem_c.dylib 0x32c96bbc start_wqthread + 0
Thread 2 name: Dispatch queue: com.apple.libdispatch-manager
Thread 2:
0 libsystem_kernel.dylib 0x332a8fbc kevent + 24
1 libdispatch.dylib 0x30205032 _dispatch_mgr_invoke + 706
2 libdispatch.dylib 0x3020603a _dispatch_queue_invoke + 86
3 libdispatch.dylib 0x302055ea _dispatch_worker_thread2 + 186
4 libsystem_c.dylib 0x32c9658a _pthread_wqthread + 258
5 libsystem_c.dylib 0x32c96bbc start_wqthread + 0
Thread 3:
0 libsystem_kernel.dylib 0x332a7d18 __semwait_signal + 24
1 libsystem_c.dylib 0x32cbc860 _pthread_cond_wait + 756
2 libsystem_c.dylib 0x32c63eb2 pthread_cond_wait + 26
3 Foundation 0x33846904 -[NSCondition wait] + 164
4 Cyntact.dylib 0x0019cebe 0x19c000 + 3774
5 Foundation 0x33839382 -[NSThread main] + 38
6 Foundation 0x338ab5c6 __NSThread__main__ + 966
7 libsystem_c.dylib 0x32c9530a _pthread_start + 242
8 libsystem_c.dylib 0x32c96bb4 thread_start + 0
Thread 4 name: WebThread
Thread 4:
0 libsystem_kernel.dylib 0x332a5c00 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x332a5758 mach_msg + 44
2 CoreFoundation 0x329382b8 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x3293a562 __CFRunLoopRun + 350
4 CoreFoundation 0x328caebc CFRunLoopRunSpecific + 224
5 CoreFoundation 0x328cadc4 CFRunLoopRunInMode + 52
6 WebCore 0x3114b27e RunWebThread(void*) + 382
7 libsystem_c.dylib 0x32c9530a _pthread_start + 242
8 libsystem_c.dylib 0x32c96bb4 thread_start + 0
Thread 5:
0 libsystem_kernel.dylib 0x332a5c00 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x332a5758 mach_msg + 44
2 CoreFoundation 0x329382b8 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x3293a562 __CFRunLoopRun + 350
4 CoreFoundation 0x328caebc CFRunLoopRunSpecific + 224
5 CoreFoundation 0x3290d6d2 CFRunLoopRun + 42
6 0x0003f96a 0x1000 + 256362
7 Foundation 0x33839382 -[NSThread main] + 38
8 Foundation 0x338ab5c6 __NSThread__main__ + 966
9 libsystem_c.dylib 0x32c9530a _pthread_start + 242
10 libsystem_c.dylib 0x32c96bb4 thread_start + 0
**Thread 6 Crashed:
0 libobjc.A.dylib 0x32da1c98 objc_msgSend + 16
1 CoreFoundation 0x328c519a CFRelease + 62
2 CFNetwork 0x3563c378 HTTPMessage::~HTTPMessage() + 56
3 CFNetwork 0x3563c336 HTTPMessage::~HTTPMessage() + 2
4 CFNetwork 0x3563c262 CFClass::FinalizeObj(void const*) + 10
5 CoreFoundation 0x328c5288 _CFRelease + 160
6 CoreFoundation 0x328c51ae CFRelease + 82
7 CFNetwork 0x3564ad52 HTTPReadFilter::~HTTPReadFilter() + 82
8 CFNetwork 0x3564acf6 HTTPReadFilter::~HTTPReadFilter() + 2
9 CFNetwork 0x3563c262 CFClass::FinalizeObj(void const*) + 10
10 CoreFoundation 0x328c5288 _CFRelease + 160
11 CoreFoundation 0x328c51ae CFRelease + 82
12 CFNetwork 0x356ba7cc HTTPReadFilter::readStreamFinalize(__CFReadStream*) + 4
13 CFNetwork 0x3564acea CFNetworkReadStream::httpStreamFinalize(__CFReadStream*, void*) + 10
14 CoreFoundation 0x32940bd8 __CFStreamDeallocate + 120
15 CoreFoundation 0x328c5288 _CFRelease + 160
16 CoreFoundation 0x328c51ae CFRelease + 82
17 CFNetwork 0x3564a7fc NetConnection::shutdownConnectionStreams() + 64
18 CFNetwork 0x356b7b38 NetConnection::closeStreamsIfPossibleOrSignalThatThatNeedsToBeDonePrettyPlease() + 20
19 CFNetwork 0x3568e018 NetConnection::doNotAllowMoreReqeusts() + 24
20 CFNetwork 0x356c9324 UnauthConnectionArray::removeValueAtIndex(long) + 28
21 CFNetwork 0x356c7ade HTTPConnectionCacheEntry::removeAllConnections() + 46
22 CFNetwork 0x356c77ac HTTPConnectionCacheEntry::setHasBeenForgotten() + 20
23 CFNetwork 0x356c78fc HTTPConnectionCacheDictionary::forgetCacheEntries() + 60
24 CFNetwork 0x356c792c ConnectionCacheTLS::resetCacheForThisThread() + 12
25 CFNetwork 0x35648aa0 ConnectionTimerTLS::_timerPurgeEntries(__CFRunLoopTimer*, void*) + 12
26 CoreFoundation 0x32937a40 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 8
27 CoreFoundation 0x32939ec4 __CFRunLoopDoTimer + 844
28 CoreFoundation 0x3293a83e __CFRunLoopRun + 1082
29 CoreFoundation 0x328caebc CFRunLoopRunSpecific + 224
30 CoreFoundation 0x328cadc4 CFRunLoopRunInMode + 52
31 Foundation 0x338467f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206
32 Foundation 0x33839382 -[NSThread main] + 38
33 Foundation 0x338ab5c6 __NSThread__main__ + 966
34 libsystem_c.dylib 0x32c9530a _pthread_start + 242
35 libsystem_c.dylib 0x32c96bb4 thread_start + 0**
Thread 7 name: com.apple.CFSocket.private
Thread 7:
0 libsystem_kernel.dylib 0x332a7c60 __select + 20
1 CoreFoundation 0x3293d8f2 __CFSocketManager + 582
2 libsystem_c.dylib 0x32c9530a _pthread_start + 242
3 libsystem_c.dylib 0x32c96bb4 thread_start + 0
jbat100
EXC_BAD_ACCESS generally means that you are sending a obj c message to an invalid memory address. Usually this happens because an object that you are using has been deallocated, while you weren't expecting it to be (here, probably HTTPMessage).
**Thread 6 Crashed:
0 libobjc.A.dylib 0x32da1c98 objc_msgSend + 16
1 CoreFoundation 0x328c519a CFRelease + 62
2 CFNetwork 0x3563c378 HTTPMessage::~HTTPMessage() + 56
The reason it works on another phone is probably just that autoreleased objects aren't being released at the same time. You should check your retain/release balances and can use NSZombieEnabled to get more information.
来源：https://stackoverflow.com/questions/7684742/how-to-solve-kern-invalid-address-on-exc-bad-access-sigsegv