On Feb 4, 2008, at 10:59 PM, Ingrid Giffin wrote:
> I'm getting an error message and could use some tips as to where to
> start
> looking for the problem:
Check the console log for a backtrace; search for BibDesk to find
possibly relevant messages.
> *** -[NSCFArray objectAtIndex:]: index (-1) beyond bounds (2)
>
> 1) I just today converted to Version 1.3.14.
> 2) I converted the URL fields as suggested.
> 3) I get this message when I open individual records.
>
> Any suggestions for what the error message means, and what the
> problem might
> be?
There's been at least one of these lurking in BibDesk for a year or
two, unfortunately. It indicates a programmer error, trying to access
an array element at index -1. It's probably code that looks like this:
NSArray *a = [NSArray array];
NSInteger i = [a count];
while(--i)
[a objectAtIndex:i];
which gives a -1 for a signed int and a huge value for an unsigned
int. Using while(i--) avoids the problem, as does explicitly
comparing e.g. while(--i > 0). Another possible problem occurs using
an unsigned index:
NSUInteger j = [a count];
while(--j > 0)
[a objectAtIndex:j];
this fails even with an explicit test, since --j is a huge value due
to integer overflow.
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