Weird behavior of std::vector

Question

I have a class like this:

class OBJ{...};

class A
{
   public:
   vector<OBJ> v;
   A(int SZ){v.clear(); v.reserve(SZ);}
};

A *a = new A(123);
OBJ something;
a->v.push_back(something);

This is a simplified version of my code. The problem is in debug mode it works perfect. But in release mode it crashes at "push_back" line. (with all optimization flags OFF) I debugged it in release mode and the problem is in the constructor of A. the size of the vector is something really big with dummy values and when I clear it, it doesn't change...

Do you know why?

Thanks,

Answer 1

I can guess - I would say that OBJ probably does not have a correctly implemented copy constructor and/or assignment operator and destructor.

Answer 2

If it helps, here is some parts of the code:

1. Here is when I push_back it to the vector:

   Mesh* mesh = new Mesh(vnum, 2*vnum);
   ...
   Face tempFace(index[0], index[1], index[2], readable/*r*/, false/*w*/);
   mesh->faces.push_back(tempFace);
   

2. Here is the copy constructor:

   Face(const Face& f)
   {
       writable = f.writable;
       readable = f.readable;
       for(int i=0; i<3; i++)
       {
           e[i] = f.e[i];
           neigh[i] = f.neigh[i];
           v[i] = f.v[i];
       }
       valid = f.valid;
       if(f.Q!=NULL)
           Q = new SymMatrix( *(f.Q) );
       else
           Q=NULL;
   }
   

3. And here is mesh constructor:

   Mesh::Mesh(int pNum, int fNum)
   {
       //Mesh::Mesh();
       points.clear();
       faces.clear();
       points.reserve(pNum);
       faces.reserve(fNum);
   }