Re: Frustrating Cocoa bug

In article <gqk7j26rcbh.fsf@xxxxxxxxxxxxx>,
Tord Kallqvist Romstad <romstad@xxxxxxxxxxx> wrote:

Sean McBride <cwatson@xxxxxxx> writes:

In article <gqk3bcykg0k.fsf@xxxxxxxxxxxxx>,
Tord Kallqvist Romstad <romstad@xxxxxxxxxxx> wrote:

You could try to set NSZombieEnabled.

Thanks, I didn't know about NSZombieEnabled. It looks like a nice
tool for debugging this kind of problem. But where do I look for
error messages? I don't see anything unusual in XCode's "Run Log"
window after setting NSZombieEnabled=YES in the program's
environment. The output of my own NSLog() statements is all that
appears, and the program seems to behave in exactly the same way as
with NSZombieEnabled=NO.

<http://developer.apple.com/technotes/tn2004/tn2124.html#SECFOUNDATION>

Yes, I found that technote. Unfortunately, it doesn't answer my
question of where to look for error messages (unless I am missing
something). When I set NSZombieEnabled to YES, no new error messages
are printed to stderr or the system log, so clearly they must be sent
somewhere else.

"any attempt to interact with a freed object will raise an exception"
.... "You can use GDB to set a breakpoint on -[_NSZombie
methodSignatureForSelector:] to further debug this sort of problem"

No messages are logged. Basically you enable it and then run in the
debugger.
.

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