核心数据Malloc错误 [英] Core Data Malloc Errors

问题描述

我注意到我在我的应用程序中的随机点有几个错误。我有2个错误，双自由和不正确的校验和释放对象。堆栈跟踪的双自由错误。任何人都可以提供任何洞察力？它发生在我的代码中的一个调用，只是设置属性到 NSNumber ，所以我不明白为什么它这样做！

I've noticed I'm getting a few errors at random points in my app. I've had 2 errors, "double free" and "incorrect checksum for freed object". Heres the stack trace of a "double free" error. Can anyone provide any insight? It's happening on a call in my code that just sets an attribute to an NSNumber so I can't understand why it's doing it!

myObject.numberAttr = [NSNumber numberWithInt:[dateComponents day]];

随机触发（不总是会发生）：

#0  0x9585b072 in malloc_error_break
#1  0x9585c218 in szone_error
#2  0x9585c34d in free_tiny_botch
#3  0x01c5e064 in _PFDeallocateObject
#4  0x01c97e2b in -[NSManagedObject(_NSInternalMethods) _setLastSnapshot__:]
#5  0x01c97a0d in -[NSManagedObjectContext(_NSInternalChangeProcessing) _establishEventSnapshotsForObject:]
#6  0x01c97866 in _PFFastMOCObjectWillChange
#7  0x01c976c5 in _PF_ManagedObject_WillChangeValueForKeyIndex
#8  0x01c97525 in _sharedIMPL_setvfk_core
#9  0x01c9b827 in _svfk_5

非常感谢，

Michael

推荐答案

事实证明，这是一个线程问题与我的托管对象上下文。我在主线程上创建它，并在我的后台线程上使用它。但是，看起来上下文必须在1个线程内创建和使用。希望这有助于任何人谁可能遇到这个问题作为调试信息不​​是很清楚！

I figured it out! It turns out that it was a threading issue with my managed object context. I was creating it on the main thread and using it on my background thread. However it would seem that the context has to be created and used all within 1 thread. Hope this helps anyone else who may come across this issue as the debugging information wasn't very clear!

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