C++ program debugged well with Cygwin4 (under Netbeans 7.2) but not with MinGW (under QT 4.8.1)

[GoldenAxe]

I have a c++ program that takes a map text file and outputs it to a graph data structure I have made. I am using QT as I needed cross-platform program and GUI as well as visual representation of the map. I have several maps in different sizes (8x8 to 4096x4096). I am using unordered_map with a vector as key and vertex as value, I'm sending hash(1) and equal functions which I wrote to the unordered_map in creation.

Under QT I am debugging my program with QT 4.8.1 for desktop MinGW (QT SDK), the program works and debugs well until I try the largest map of 4096x4096, then the program gets stuck with the following error: "the inferior stopped because it received a signal from operating system". When debugging, the program halts at the hash function which used inside the unordered_map and not as part of the insertion state, but at a getter(2).

Under Netbeans IDE 7.2 and Cygwin4 all works fine (debug and run).

Some code info:
@typedef std::vector<double> coordinate;
typedef std::unordered_map<coordinate const*, Vertex<Element>*, container_hash, container_equal> vertexsContainer;
vertexsContainer *m_vertexes
@

(1) hash function:
@struct container_hash
{
size_t operator()(coordinate const *cord) const
{
size_t sum = 0;
std::ostringstream ss;

    for ( auto it = cord->begin() ; it != cord->end() ; ++it )
    {
       ss << *it;
    }

    sum = std::hash<std::string>()(ss.str());
    return sum;
}

};@

(2) the getter:
@template <class Element>
Vertex<Element> *Graph<Element>::getVertex(const coordinate &cord)
{
try
{
Vertex<Element> *v = m_vertexes->at(&cord);
return v;
}
catch (std::exception& e)
{
return NULL;
}
}@

• I was thinking maybe it was some memory issue at the beginning, so before I was thinking of trying Netbeans I checked it with QT on my friend pc with a 16GB RAM and got the same error.

Update: I try to run this on visual studio 2012, I got a bad_alloc error which halt my program, when looking at task manager I saw the memory assigned to the program was going up to 2GB, could be it's because it's a 32bit program?

Update: I debugged my program under Netbeans with 32bit architecture and Cygwin4 and all worked fine, so maybe it is not a 32 bit problem, also the memory used with netbeans was 1.5GB, so how in MinGW and VS2012 it's going up to 2GB?

Thanks.