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IDProjectCategoryView StatusDate SubmittedLast Update
0002485ITKpublic2005-11-14 11:302007-09-21 16:33
Reporter 
Assigned Touser390 
PrioritynormalSeveritymajorReproducibilityalways
StatusclosedResolutionfixed 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0002485: PointIdsEnd() of itk::PolygonCell crashes in Visual Studio 2005
DescriptionThe "return &*(m_PointIds.end())" construction of the PointIdsEnd() method in itk::PolygonCell causes applications built using Visual Studio 2005 to crash.

The Debug version of applications calling this method causes error "vector iterator not dereferencable" in "operator*()".

It seems like Microsoft has implemented the std::vector class differently, and dereferencing the past end iterator is no longer possible.

One possible solution is to change the return expression into:

return &(m_PointIds[GetNumberOfPoints()-1])+1;

Of course this will cause problems if the polygon cell is empty.
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  Notes
(0003289)
Lydia Ng (developer)
2005-11-22 11:21
(0003342)
user390
2005-11-30 14:17

 Thanks for pointing this out. Its fixed.

http://www.itk.org/cgi-bin/viewcvs.cgi/Code/Common/itkPolygonCell.txx?root=Insight&r1=text&tr1=1.30&r2=text&tr2=1.29&diff_format=h [^]

Notes:

As you mentioned VS8 checks if an iterator is dereferencible prior to derefencing it.. (probably in one of the debug modes..)

#if _HAS_ITERATOR_DEBUGGING
        if (this->_Mycont == 0
            || _Myptr < ((_Myvec *)this->_Mycont)->_Myfirst
            || ((_Myvec *)this->_Mycont)->_Mylast <= _Myptr)
            {
            _DEBUG_ERROR("vector iterator not dereferencable");
            _SCL_SECURE_OUT_OF_RANGE;
            }
 #else
....


Prior to copying the points from another cell, the Polygon cell now checks if the other cell had any points at all, avoiding bogus dereferences. The usual begin and end methods are not checked however for efficieny. This should fix the bugs.
(0007841)
Bill Lorensen (developer)
2007-06-08 14:40

 I'm not sure this was fixed in 2.2. It is now corrected in CVS Head (post 3.2). The fix is the one suggested by the reporter.
http://www.itk.org/cgi-bin/viewcvs.cgi/Code/Common/itkPolygonCell.txx?root=Insight&r1=1.30&r2=1.31 [^]
(0009220)
Luis Ibanez (manager)
2007-09-21 16:33

 changing status from 'resolved' to 'closed'

The issue was already fixed in the CVS trunk.

 Issue History
Date Modified Username Field Change
2007-09-21 16:33 Luis Ibanez Status resolved => closed
2007-09-21 16:33 Luis Ibanez Note Added: 0009220

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