On Jan 20, 2012, at 8:59 PM, Kyle Sluder wrote:

>> Update... sometimes I'm getting this error, too...
>> 
>> malloc: reference count underflow for 0x40048fb00, ....
>> 
>> Garbage collected app, Xcode 4.2.1, Lion 10.7.2.
>> 
>> The breakpoint is inside of NSOpenPanel -runModal but ONLY occurs when
>> dragging to select multiple files.  cmd-click or shift-click work fine.
>> Running with malloc guards and other tests for trashed memory haven't
>> shown anything obvious.   And why only when dragging?
> 
> 1. Are you sandboxed?

Nope.

> 2. Does malloc_stack_logging yield any useful info for that address? I must 
> confess I don't know much at all about GC.

None of the malloc debug options I've tried (and I think I've played
with most of them in one combination or another) have made any difference.

The application is small, so I think my next step will be to convert it
to ARC.  If nothing else it will give me a chance to play with ARC, something
I've not done, yet.  I'm curious as to what I'll find (if anything).

Marc


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