Breakpoint 1, SimGrid::put (this=0x7fffffffe170, agent=0x7b7cd0, cell=0x7fffe928b390) at core/simgrid.cpp:20
20      assert(cell != NULL && agent != NULL && cell->sim() == this && cell->agent() == NULL);
(gdb) p *cell
Cannot access memory at address 0x7fffe928b390



Billes sim;
sim.add(50000);


void Billes::add(unsigned int n){
    for(unsigned int i = 0 ; i < n ; i++)
        put(new Bille(), emptyCell());
}

SimGrid::SimGrid(unsigned int xlen, unsigned int ylen){
    m_xlen = xlen;
    m_ylen = ylen;
    for(unsigned int x = 0 ; x < m_xlen ; x++){
        for(unsigned y = 0 ; y < m_ylen ; y++){
            m_cells.push_back(Cell(this, x, y));
            m_emptyCells.push_back(cell(x, y));
        }
    }
}

void SimGrid::put(GridAgent *agent, Cell *cell){
    assert(cell != NULL && agent != NULL && cell->sim() == this && cell->agent() == NULL);
    cell->agent(agent);
    agent->cell(cell);
    for(unsigned int i = 0 ; i < m_emptyCells.size() ; i++){
        if(m_emptyCells[i] == cell){
            m_emptyCells.erase(m_emptyCells.begin() + i);
            break;
        }
    }
    addAgent(agent);
}

Cell *SimGrid::emptyCell(){ return m_emptyCells.at(lrand48() % m_emptyCells.size()); }