_BLOCK_TYPE_IS_VALID(pHead -> nBlockUse)

Hello,
I have been struggling with a memory corruption/crash that causes the message in the subject and humbly ask for your help.
I narrowed down the code to just a few lines hopefully it will be easy to see what is that I'm doing wrong.
Here is the main program

Code:

---

#include "example.h"
#include <vector>
int main()
{
    std::vector<exampleClass> objs;
    exampleClass test;
    objs.push_back(test);
    return 0;
}

---

And here is the header that defines the classes and the implementation:

Code:

---

class Curve
{
private:
    double *m_x;
public:
    Curve(int n, double *x)
    {
        m_x = new double[n];
    }
    ~Curve()
    {
        delete [] m_x;
    }
};
///////////////////////////////////
class exampleClassComp
{
private:
    double val;
    Curve cv;
public:
    exampleClassComp() : cv(0,0)
    { }
friend class exampleClass;
};
//////////////////////////////
class exampleClass
{
private:
    int id;
    exampleClassComp obj;
public:
    exampleClass(void);
};
///////////////////////////////
exampleClass::exampleClass(void)
{
    id = 0;
    obj.val = 0.0;
}

---

It seems that the crash occurs in the dst of the class Curve. Also, I noticed that it is called when the object "test" is pushed onto the vector.
If anyone can offer some insight it would be much appreciated!
Thanks!

The problem is that your class lacks a copy constructor.
The same pointer is copied to two objects (one when creating it and one when pushing it into the vector), so the destructor tries to delete the same memory twice.
Either you need to perform a deep copy (ie allocate new storage in new object and copy data over) or make the copy constructor private.

Thanks for the reply.
I am assuming that the class that needs to have copy constructor and overloaded operator = is the Curve class.
I will give it a shot and report.
Thanks again.
Andrea.