ブロックを使用するとEXC_BAD_ACCESSが発生する

Question

ブロックを使用したいが、いくつかの呼び出しの後でEXC_BAD_ACCESSが発生する。

私のコード：Webサービスが終了すると

- (void) sendBasket { 
    if (currentSendToBasketBlock != nil) { 
    // there's already a webservice going... set the new one as waiting 
    waitingSendToBasketBlock =^{ 
     WebServicesModel *webServicesModel = [[[WebServicesModel alloc] init] autorelease]; 
     webServicesModel.delegate = self; 
     [webServicesModel sendBasketToServer:currentBasket]; 

     [self showBasketBackground]; 

    }; 
    [waitingSendToBasketBlock copy]; 
} else { 
    currentSendToBasketBlock =^{ 
     WebServicesModel *webServicesModel = [[[WebServicesModel alloc] init] autorelease]; 
     webServicesModel.delegate = self; 
     [webServicesModel sendBasketToServer:currentBasket]; 

     [self showBasketBackground]; 
    }; 

    [currentSendToBasketBlock copy]; 

    currentSendToBasketBlock(); 
} 
} 

、それは同じオブジェクト上の特定のメソッドを呼び出します。

- (void) specificMethod { 
    if (waitingSendToBasketBlock != nil) { 
     waitingSendToBasketBlock(); // here, the EXC_BAD_ACCESS happens 
     waitingSendToBasketBlock = nil; 
    } 
} 

私は何をしないのですか？器具はゾンビを見つけません...

ありがとう！

編集：クラッシュログ

Thread 0 name: Dispatch queue: com.apple.libdispatch-manager 
Thread 0: 
0 libsystem_kernel.dylib   0x35590fbc kevent + 24 
1 libdispatch.dylib    0x3525bed4 _dispatch_mgr_invoke + 744 
2 libdispatch.dylib    0x3525cf3a _dispatch_queue_invoke + 70 
3 libdispatch.dylib    0x3525c4ec _dispatch_worker_thread2 + 228 
4 libsystem_c.dylib    0x3566758a _pthread_wqthread + 258 
5 libsystem_c.dylib    0x35667bbc start_wqthread + 0 

Thread 1 name: WebThread 
Thread 1: 
0 libsystem_kernel.dylib   0x3558dc00 mach_msg_trap + 20 
1 libsystem_kernel.dylib   0x3558d758 mach_msg + 44 
2 CoreFoundation     0x309582b8 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x3095a562 __CFRunLoopRun + 350 
4 CoreFoundation     0x308eaebc CFRunLoopRunSpecific + 224 
5 CoreFoundation     0x308eadc4 CFRunLoopRunInMode + 52 
6 WebCore       0x35f5327e _ZL12RunWebThreadPv + 382 
7 libsystem_c.dylib    0x3566630a _pthread_start + 242 
8 libsystem_c.dylib    0x35667bb4 thread_start + 0 

Thread 2: 
0 libsystem_kernel.dylib   0x35591cb0 stat + 12 
1 CFNetwork      0x34cccf56 DiskCookieStorage::syncStorageLocked() + 422 
2 CFNetwork      0x34c3fa60 PrivateHTTPCookieStorage::syncStorage() + 20 
3 CFNetwork      0x34ccaa7e HTTPCookieStorage::syncStorage() + 6 
4 CFNetwork      0x34ccaa9c HTTPCookieStorage::_syncTimerFired(__CFRunLoopTimer*, void*) + 12 
5 CoreFoundation     0x30957a40 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 8 
6 CoreFoundation     0x30959ec4 __CFRunLoopDoTimer + 844 
7 CoreFoundation     0x3095a83e __CFRunLoopRun + 1082 
8 CoreFoundation     0x308eaebc CFRunLoopRunSpecific + 224 
9 CoreFoundation     0x308eadc4 CFRunLoopRunInMode + 52 
10 Foundation      0x341dd7f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206 
11 Foundation      0x341d0382 -[NSThread main] + 38 
12 Foundation      0x342425c6 __NSThread__main__ + 966 
13 libsystem_c.dylib    0x3566630a _pthread_start + 242 
14 libsystem_c.dylib    0x35667bb4 thread_start + 0 

Thread 3 name: com.apple.CFSocket.private 
Thread 3: 
0 libsystem_kernel.dylib   0x3558fc60 __select + 20 
1 CoreFoundation     0x3095d8f2 __CFSocketManager + 582 
2 libsystem_c.dylib    0x3566630a _pthread_start + 242 
3 libsystem_c.dylib    0x35667bb4 thread_start + 0 

Thread 4: 
0 libsystem_kernel.dylib   0x3558dc00 mach_msg_trap + 20 
1 libsystem_kernel.dylib   0x3558d758 mach_msg + 44 
2 CoreFoundation     0x309582b8 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x3095a562 __CFRunLoopRun + 350 
4 CoreFoundation     0x308eaebc CFRunLoopRunSpecific + 224 
5 CoreFoundation     0x3092d6d2 CFRunLoopRun + 42 
6 MyProject      0x0011c41a +[ASIHTTPRequest runRequests] (ASIHTTPRequest.m:4773) 
7 Foundation      0x341d0382 -[NSThread main] + 38 
8 Foundation      0x342425c6 __NSThread__main__ + 966 
9 libsystem_c.dylib    0x3566630a _pthread_start + 242 
10 libsystem_c.dylib    0x35667bb4 thread_start + 0 

Thread 5: 
0 libsystem_kernel.dylib   0x355903ec __workq_kernreturn + 8 
1 libsystem_c.dylib    0x356676d8 _pthread_wqthread + 592 
2 libsystem_c.dylib    0x35667bbc start_wqthread + 0 

Thread 6: 
0 libsystem_kernel.dylib   0x355903ec __workq_kernreturn + 8 
1 libsystem_c.dylib    0x356676d8 _pthread_wqthread + 592 
2 libsystem_c.dylib    0x35667bbc start_wqthread + 0 

Thread 7: 
0 libsystem_kernel.dylib   0x355903ec __workq_kernreturn + 8 
1 libsystem_c.dylib    0x356676d8 _pthread_wqthread + 592 
2 libsystem_c.dylib    0x35667bbc start_wqthread + 0 

Answer 1

あなたはまだスタックに格納されたブロックにアクセスしようとしているので、コピーして何もしていません。 copyへの電話の場所でこれを試してください。

waitingSendToBasketBlock = Block_copy(waitingSendToBasketBlock); 
//and 
currentSendToBasketBlock = Block_copy(currentSendToBasketBlock);