[Insight-users] ITK and iterators debugging in Visual Studio 8

[Karthik Krishnan]

On 12/27/06, Matei Stroila <matei.stroila at gmail.com> wrote:
>
> Yes, here it is:
>
> Expression: vector iterators incompatible"
> Line 170:  same = (m_Index == region.m_Index);


This is a perfectly valid error (at least from VS8 perspective).

Following is a the code snippet that throws this error.

#if _HAS_ITERATOR_DEBUGGING
       void _Compat(const _Myt& _Right) const
               {       // test for compatible iterator pair
               if (this->_Mycont == 0 || this->_Mycont != _Right._Mycont)
                       {
                       _DEBUG_ERROR("vector iterators incompatible");
                       _SCL_SECURE_INVALID_ARGUMENT;
                       }
               }
#endif /* _HAS_ITERATOR_DEBUGGING */


What this says is that its illegal to :
1. Compare a null iterator (of course)
2. Compare two different container objects. (why ? don't ask me.)

It is therefore natural for the error to be thrown in line 170 of
itkImageIORegion.h
   same = (m_Index == region.m_Index);

because you are comparing two different std::vector objects. I would suspect
that comparison is being done in line 96 of itkImageFileWriter.txx .

The fix would be to
1. write our own macro in itkMacro.h to compare two std::vector objects. (if
we care about debugging with VS8.)
  Or
2. Set the flag _HAS_ITERATOR_DEBUGGING=0 flag by default when the ITK
library is compiled.

Please log this issue as an entry in the bug tracker.

> > Even if I define  _SECURE_SCL=0 and _HAS_ITERATOR_DEBUGGING=0 in my

> > > project,
> > > I still cannot use ITK in debug mode, since I keep getting run time
> > > errors related to the iterator debugging.



Remember. You need to recompile ITK (every library you use), if you change
any of these flags.. I suspect you did not do so.

PS:
Please read
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvs05/html/VisCExSecApps.aspto
see a list of the security features in VS8.

Thanks
-karthik
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