On Mar 26, 2011, at 20:46, Jeffrey Walton wrote:

> I deleted all connections and actions in Interface Builder. I closed
> IB and Xcode. I cleaned the project (including the two hidden files in
> the xcode.proj director). I reopened the project, and then reconnected
> the NIB in IB.
> 
> Everything is OK.


Possibly. Or possibly it's still wrong and there are multiple controllers, but 
by chance things are happening in a different order now, and so it works by 
accident.

On Mar 26, 2011, at 20:52, Jeffrey Walton wrote:

> It did not help that GDB's 'po' command
> claimed the address was not even an object!


For all its faults I've never see GDB lie about something like that. If it said 
so, I'd believe it.

If it was a *recently deallocated* object, the block of free memory may still 
look enough like an object for it to (for example) report that it has a class.


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