SIGTRAP error on iOS – AutoreleasePoolPage::busted

Question

Does anyone have any clue what's causing this crash?

It happens very rarely.

The crash reports are coming via HockeyApp from the device. I've not been able to reproduce it on the simulator.

Any ideas greatly appreciated.

Exception Type:  SIGTRAP
Exception Codes: #0 at 0x197c73c10
Crashed Thread:  0

Thread 0 Crashed:
0   libobjc.A.dylib                      0x0000000197c73c10 _objc_trap() + 0
1   libobjc.A.dylib                      0x0000000197c73c80 _objc_fatal + 80
2   libobjc.A.dylib                      0x0000000197c8e7fc (anonymous namespace)::AutoreleasePoolPage::busted(bool) + 140
3   libobjc.A.dylib                      0x0000000197c8d54c (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 88
4   CoreFoundation                       0x0000000187418f94 _CFAutoreleasePoolPop + 24
5   UIKit                                0x000000018bcd8c28 _wrapRunLoopWithAutoreleasePoolHandler + 72
6   CoreFoundation                       0x00000001874ee14c __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 28
7   CoreFoundation                       0x00000001874eb0d8 __CFRunLoopDoObservers + 356
8   CoreFoundation                       0x00000001874eb4b8 __CFRunLoopRun + 832
9   CoreFoundation                       0x00000001874191f4 CFRunLoopRunSpecific + 392
10  GraphicsServices                     0x00000001905a75a4 GSEventRunModal + 164
11  UIKit                                0x000000018bd4a784 UIApplicationMain + 1484
12  MyAppName                            0x00000001001794d4 main (main.mm:15)
13  libdyld.dylib                        0x00000001982e2a08 start + 0

Thread 1:
0   libsystem_kernel.dylib               0x00000001983e0c94 kevent64 + 8
1   libdispatch.dylib                    0x00000001982bb3b4 _dispatch_mgr_thread + 48

Thread 2:
0   libsystem_kernel.dylib               0x00000001983e0e7c mach_msg_trap + 8
1   CoreFoundation                       0x00000001874ed5cc __CFRunLoopServiceMachPort + 196
2   CoreFoundation                       0x00000001874eb520 __CFRunLoopRun + 936
3   CoreFoundation                       0x00000001874191f4 CFRunLoopRunSpecific + 392
4   CFNetwork                            0x0000000186f1d6a4 +[NSURLConnection(Loader) _resourceLoadLoop:] + 436
5   Foundation                           0x0000000188405c0c __NSThread__main__ + 1068
6   libsystem_pthread.dylib              0x0000000198497e80 _pthread_body + 160
7   libsystem_pthread.dylib              0x0000000198497ddc _pthread_start + 156
8   libsystem_pthread.dylib              0x0000000198494fb0 thread_start + 0

Thread 3:
0   libsystem_kernel.dylib               0x00000001983fb498 __select + 8
1   libsystem_pthread.dylib              0x0000000198497e80 _pthread_body + 160
2   libsystem_pthread.dylib              0x0000000198497ddc _pthread_start + 156
3   libsystem_pthread.dylib              0x0000000198494fb0 thread_start + 0

Thread 4:
0   libsystem_kernel.dylib               0x00000001983fbc78 __workq_kernreturn + 8
1   libsystem_pthread.dylib              0x0000000198494fa8 start_wqthread + 0

Thread 5:
0   libsystem_kernel.dylib               0x00000001983fbc78 __workq_kernreturn + 8
1   libsystem_pthread.dylib              0x0000000198494fa8 start_wqthread + 0

Answer 1

I fixed this in the end by refactoring my code.

I had blocks that I was holding on to for a navigation menu – the idea being to just call the block when a menu button was tapped.

I refactored my navigation menu buttons to no longer rely on the blocks and these AutoreleasePoolPage::busted errors disappeared.