核心数据崩溃,其中一个实体的exc-bad-access

希望有人能帮助我调试这个问题,因为只有exc_bad_访问是我收到的唯一错误。我也试过打开nszombienabled,但据我所知,没有更多的信息。

问题。我有四个实体:

A->B->C->D

其中箭头表示集合:“A”包含与“B”的A对多关系、“B”A对与“C”的多关系等,用于创建我使用的实体:

id dto = [NSEntityDescription insertNewObjectForEntityForName:@"A" 
    inManagedObjectContext:context];
NSLog(@"DTO: %@", dto);

这似乎适用于A、B和C。但是,当在实体D上使用它时,应用程序会崩溃,无法访问exc-b a d-u。当访问对象时,似乎出现了这个问题,因为当注释nslog和其他访问dto对象的方法时,程序成功运行。

更新:

控制台输出

GNU gdb 6.3.50-20050815 (Apple version gdb-1346) (Fri Sep 18 20:40:51 UTC 2009)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin".sharedlibrary apply-load-rules all
Attaching to process 3100.
Program received signal:  “EXC_BAD_ACCESS”.
warning: Unable to restore previously selected frame.
No memory available to program now: unsafe to call malloc
warning: check_safe_call: could not restore current frame

Data Formatters temporarily unavailable, will re-try after a 'continue'. (Not safe to call dlopen at this time.)
warning: Unable to restore previously selected frame.

叠加
堆栈跟踪非常大(?),调试时加载“62826堆栈帧”。显示其中的一部分: alt text http://i50.tinypic.com/2qrzxi1.png alt text http://i49.tinypic.com/iedoj5.png
第8-41行重复到第62500帧周围。