Debug Assertion Failed dbgdel.cpp error

[marat]

I have a managed c++ function below that makes a call to an unmanaged c++ dll
.. This function is called from a C# app, resulting in a

"Debug Assertion Failed dbgdel.cpp Line 52
Expression: _BLOCK_TYPE_IS_ VALID(pHead->nBlockUse)" errir message.

This happens on function exit, looks like related to destruction of some vector.

Any ideas why ????


ArrayList*
NM::doSomething (ArrayList* anchorStrikesLi st,
ArrayList* anchorVolsList,
ArrayList* allStrikesList

{
vector<double> anchorStrikesVe c, anchorVolsVec, allStrikesVec, allVolsVec;

////// convert to vectors ////

for (int i = 0; i < anchorStrikesLi st->Count; ++i)
{
double val = *dynamic_cast<d ouble __gc *>(anchorStrike sList->get_Item(i)) ;
anchorStrikesVe c.push_back(val );
}
for (i = 0; i < anchorVolsList->Count; ++i)
{
double val = *dynamic_cast<d ouble __gc *>(anchorVolsLi st->get_Item(i)) ;
anchorVolsVec.p ush_back(val);
}
for (i = 0; i < allStrikesList->Count; ++i)
{
double val = *dynamic_cast<d ouble __gc *>(allStrikesLi st->get_Item(i)) ;
allStrikesVec.p ush_back(val);
}

// unmanaged c++ dll call
foo(anchorStrik esVec, anchorVolsVec, allStrikesVec, allVolsVec);

// Convert back to vector of computed vols and return
ArrayList* allVolsList = new ArrayList();
for (i = 0; i < allVolsVec.size (); ++i)
{
double vol = allVolsVec[i];
allVolsList->Add(__box(vol) );
}
return allVolsList;

}

[marat]

Re: Debug Assertion Failed dbgdel.cpp error

Surely someone must have had experience with this one ?

mruvinov@yahoo. com (marat) wrote in message news:<fc7075e5. 0309101301.2be3 44d1@posting.go ogle.com>...[color=blue]
> I have a managed c++ function below that makes a call to an unmanaged c++ dll
> . This function is called from a C# app, resulting in a
>
> "Debug Assertion Failed dbgdel.cpp Line 52
> Expression: _BLOCK_TYPE_IS_ VALID(pHead->nBlockUse)" error message.
>
> This happens on function exit, looks like related to destruction of some vector.
>
> Any ideas why ????
>
>
> ArrayList*
> NM::doSomething (ArrayList* anchorStrikesLi st,
> ArrayList* anchorVolsList,
> ArrayList* allStrikesList
>
> {
> vector<double> anchorStrikesVe c, anchorVolsVec, allStrikesVec, allVolsVec;
>
> ////// convert to vectors ////
>
> for (int i = 0; i < anchorStrikesLi st->Count; ++i)
> {
> double val = *dynamic_cast<d ouble __gc *>(anchorStrike sList->get_Item(i)) ;
> anchorStrikesVe c.push_back(val );
> }
> for (i = 0; i < anchorVolsList->Count; ++i)
> {
> double val = *dynamic_cast<d ouble __gc *>(anchorVolsLi st->get_Item(i)) ;
> anchorVolsVec.p ush_back(val);
> }
> for (i = 0; i < allStrikesList->Count; ++i)
> {
> double val = *dynamic_cast<d ouble __gc *>(allStrikesLi st->get_Item(i)) ;
> allStrikesVec.p ush_back(val);
> }
>
> // unmanaged c++ dll call
> foo(anchorStrik esVec, anchorVolsVec, allStrikesVec, allVolsVec);
>
> // Convert back to vector of computed vols and return
> ArrayList* allVolsList = new ArrayList();
> for (i = 0; i < allVolsVec.size (); ++i)
> {
> double vol = allVolsVec[i];
> allVolsList->Add(__box(vol) );
> }
> return allVolsList;
>
> }[/color]

[marat]

Re: Debug Assertion Failed dbgdel.cpp error

The problem appears to occur due to the unmanaged foo() call's last
argument which is a non const reference to a vector.

The prototype of foo is :

void foo(const vector<double>& l1,
const vector<double>& l2,
const vector<double>& l3,
vector<double>& result);

If result vector is empty, no problem occurs.
If non-empty then the below error occurs.

The last argument needs to be non const.

Anyone know how to solve this one ?
[color=blue][color=green]
> >
> >
> > ArrayList*
> > NM::doSomething (ArrayList* anchorStrikesLi st,
> > ArrayList* anchorVolsList,
> > ArrayList* allStrikesList
> >
> > {
> > vector<double> anchorStrikesVe c, anchorVolsVec, allStrikesVec, allVolsVec;
> >
> > ////// convert to vectors ////
> >
> > for (int i = 0; i < anchorStrikesLi st->Count; ++i)
> > {
> > double val = *dynamic_cast<d ouble __gc *>(anchorStrike sList->get_Item(i)) ;
> > anchorStrikesVe c.push_back(val );
> > }
> > for (i = 0; i < anchorVolsList->Count; ++i)
> > {
> > double val = *dynamic_cast<d ouble __gc *>(anchorVolsLi st->get_Item(i)) ;
> > anchorVolsVec.p ush_back(val);
> > }
> > for (i = 0; i < allStrikesList->Count; ++i)
> > {
> > double val = *dynamic_cast<d ouble __gc *>(allStrikesLi st->get_Item(i)) ;
> > allStrikesVec.p ush_back(val);
> > }
> >
> > // unmanaged c++ dll call
> > foo(anchorStrik esVec, anchorVolsVec, allStrikesVec, allVolsVec);
> >
> > // Convert back to vector of computed vols and return
> > ArrayList* allVolsList = new ArrayList();
> > for (i = 0; i < allVolsVec.size (); ++i)
> > {
> > double vol = allVolsVec[i];
> > allVolsList->Add(__box(vol) );
> > }
> > return allVolsList;
> >
> > }[/color][/color]