C++ Program Crashing on Exit (Windows XP)

// GameManager.h#include <iostream>#include <string>#include <list>#include <boost/shared_ptr.hpp>#include "GameEngine.h"#include "Misc/Singleton.h"#include "Misc/Colors.h"#include "2D/Camera2D.h"#include "2D/Wall2D.h"#include "Path.h"#include "ComponentListBase.h"#include "ComponentList.h"#include "TrackSegment.h"#include "StartPosition.h"#define Game GameManager::Instance()using std::string;using std::list;// File extensionsconst string COURSE_EXT = ".crs";  // Used in game.const string EDIT_EXT   = ".ecf";  // Editable course file for editor.// TODO: Search and change wall comments.// TODO: Make getting mouse state a little easier through GameEngine or utils.// Singleton that controls all data and functions of the game, including input,// updating data, and rendering.class GameManager : public GameEngine, public Singleton<GameManager>{    public:        typedef ComponentList<TrackSegment>          Track;        typedef ComponentList<Vector2D>              VertexList;        typedef ComponentList<StartPosition>         StartList;        typedef boost::shared_ptr<ComponentListBase> SectPtr;        typedef list<SectPtr>                        SectionList;        typedef SectionList::iterator                SectItr;        typedef SectionList::const_iterator          SectConstItr;        typedef SectionList::reverse_iterator        SectRItr;        typedef SectionList::const_reverse_iterator  SectConstRItr;        GameManager() {}        virtual ~GameManager() {}        void NewCourse(string filename, int width, int height);        void OpenEditable(string filename);        void SaveEditable(string filename);        void SaveCourse(string filename);        void ToggleLooped();        void ToggleDirection();        void ShowComponents(bool show);        void ShowConnections(bool show);        ModeType Mode() const { return m_Mode; }        void Mode(ModeType mode) { m_Mode = mode; DeselectSection(); }        void PointSize(double size)  { m_PointSize = size; }        void LineSize(double size)   { m_LineSize = size; }        void NormalSize(double size) { ResizeNormals(size / m_Camera.Scale() ); }        int WorldWidth() const   { return m_WorldWidth; }        int WorldHeight() const  { return m_WorldHeight; }        int WorkWidth() const    { return m_WorkWidth; }        int WorkHeight() const   { return m_WorkHeight; }    private:        virtual void GameInitialize();        virtual void Update(int elapsedTicks);        virtual void Render();        void         RenderSelectionBox();        virtual void KeyDown(int key, int mod);        virtual void KeyUp(int key, int mod);        virtual void MouseMotion(int button,                                 int x,    int y,                                 int relX, int relY );        virtual void MouseButtonDown(int button,                                     int x,    int y,                                     int relX, int relY );        virtual void MouseButtonUp(int button,                                   int x,    int y,                                   int relX, int relY );        virtual void WindowActive();        virtual void WindowInactive();        virtual void End();        void SelectSection(SectItr selection);        void DeselectSection();        void RemoveSection();        void ResizeNormals(double size);        /// GAME DATA        // Size of course.        int m_WorldWidth;        int m_WorldHeight;        // Area excluding toolbars, etc.        int m_WorkWidth;        int m_WorkHeight;        Camera2D m_Camera;        SectionList        m_Sections;        // Selected section.  Null if none are selected.        SectItr            m_SelectedSection;        // Holds copied parts of component lists.        SectPtr            m_Clipboard;        // Determines what type of vertex list to create.        ModeType           m_Mode;        // Used to keep track of selection rectangles.        Vector2D           m_ClickPos;        double             m_PointSize;        double             m_LineSize;        double             m_NormalSize;};// GameManager.cpp#include <iostream>#include <fstream>#include <string>#include <sstream>#include <list>#include <boost/shared_ptr.hpp>#include "SDL.h"#include <Gl/gl.h>#include "GameManager.h"#include "GuiManager.h"#include "Misc/Singleton.h"#include "Debug/Exception.h"#include "Misc/Utils.h"#include "Misc/Colors.h"#include "2D/Vector2D.h"#include "2D/Rectangle.h"#include "2D/Camera2D.h"#include "2D/Wall2D.h"#include "Path.h"#include "2D/Geometry.h"#include "ComponentListBase.h"#include "TrackComponentList.h"#include "VertexList.h"#include "StartPositionList.h"template <> GameManager* Singleton<GameManager>::pInstance = 0;// Initalize game data.void GameManager::GameInitialize(){    m_WorkWidth   = 800;    m_WorkHeight  = 600;    m_WorldWidth  = 1600;    m_WorldHeight = 1200;    m_Camera = Camera2D(m_WorldWidth, m_WorldHeight, m_WorkWidth, m_WorkHeight);    m_SelectedSection = NULL;    m_Mode            = MD_TRACK;    m_PointSize  = 5.0;    m_LineSize   = 2.0;    m_NormalSize = 5.0;}// Reset size, name, and content to create a new course.void GameManager::NewCourse(string filename, int width, int height){    m_WorldWidth  = width;    m_WorldHeight = height;    m_Camera = Camera2D(m_WorldWidth, m_WorldHeight, m_WorkWidth, m_WorkHeight);	m_Sections.clear();	m_SelectedSection = NULL;}// Update the game state each step.void GameManager::Update(int elapsedTicks){}// Render each frame.void GameManager::Render(){    m_Camera.Update();    // Push line attributes.    glPushAttrib(GL_POINT_BIT | GL_LINE_BIT);    glPointSize(m_PointSize);    glLineWidth(m_LineSize);    // Render sections.    SectConstItr sect;    for (sect = m_Sections.begin(); sect != m_Sections.end(); ++sect)    	(*sect)->Render();    RenderSelectionBox();    // Draw boundaries of world.    glLineWidth(4.0);    glBegin(GL_LINE_LOOP);        glColor3fv( C3f::RED.data() );        glVertex2f(0, 0);        glVertex2f(m_WorldWidth, 0);        glVertex2f(m_WorldWidth, m_WorldHeight);        glVertex2f(0, m_WorldHeight);    glEnd();    glPopAttrib();}void GameManager::RenderSelectionBox(){    int x, y;    Uint8 button = SDL_GetMouseState(&x, &y);    Vector2D pos(x, y);    // Transform to world coordinates.    m_Camera.Transform(pos.x, pos.y);    // If right mouse button is down, draw selection rectangle.    if ( button & SDL_BUTTON_RMASK )    {        glEnable(GL_LINE_STIPPLE);        glLineWidth(1.0);        glLineStipple(1, 0x03ff);  // 1111 1111 1100 0000        glBegin(GL_LINE_LOOP);           glColor3fv( C3f::BLACK.data() );           glVertex2f(pos.x,        pos.y);           glVertex2f(pos.x,        m_ClickPos.y);           glVertex2f(m_ClickPos.x, m_ClickPos.y);           glVertex2f(m_ClickPos.x, pos.y);        glEnd();        glDisable(GL_LINE_STIPPLE);    }}void GameManager::SelectSection(SectItr selection){    if (selection != m_SelectedSection)    {        DeselectSection();        m_SelectedSection = selection;        m_Mode = (*m_SelectedSection)->Mode();        Gui().ModeChanged(m_Mode);        (*m_SelectedSection)->onSelect();    }}void GameManager::DeselectSection(){    if (m_SelectedSection != NULL)    {        (*m_SelectedSection)->DeselectAll();        (*m_SelectedSection)->onDeselect();    }    m_SelectedSection = NULL;}void GameManager::RemoveSection(){    if (m_SelectedSection != NULL)    {        m_Sections.erase(m_SelectedSection);        m_SelectedSection = NULL;    }}// Called once when a key is pressed.void GameManager::KeyDown(int key, int mod){    switch (key)    {    /// MAP CONTROLS    /// <CTRL+N> Brings up new dialog.    case SDLK_n:        if (mod & KMOD_CTRL)            Gui().HandleEvent("open_dialog_new");        break;    /// <CTRL+O> Brings up open dialog.    case SDLK_o:        if (mod & KMOD_CTRL)            Gui().HandleEvent("open_dialog_open");        break;    /// <CTRL+S> Brings up save dialog.    case SDLK_s:        if (mod & KMOD_CTRL)            Gui().HandleEvent("open_dialog_save");        break;    /// <CTRL+H> Brings up help dialog.    case SDLK_h:        if (mod & KMOD_CTRL)            Gui().HandleEvent("open_dialog_help");        break;    /// <L> Toggle between looped or linear sections.    case SDLK_l:        Gui().HandleEvent("toggle_looped");        break;    /// <D> Reverse the direction of the section.    case SDLK_d:        Gui().HandleEvent("toggle_direction");        break;    /// <CTRL+C> Copy selected components to the clipboard.    case SDLK_c:        if (m_SelectedSection == NULL)  break;        if (mod & KMOD_CTRL)            m_Clipboard = (*m_SelectedSection)->Copy();        break;    /// <CTRL+V> Paste the component list from the clipboard.    case SDLK_v:        if (m_Clipboard == NULL)  break;        if (mod & KMOD_CTRL)        {            // Create a deep copy of the clipboard and push it in the list.            SectPtr sect( m_Clipboard->Clone() );            m_Sections.push_back(sect);            // Select the section and all of its components.            SelectSection( Last(m_Sections) );            (*m_SelectedSection)->SelectAll();        }        break;    /// <DElETE> Delete components in selected section.    /// <CTRL+DELETE> Delete entire section.    case SDLK_DELETE:        if (m_SelectedSection == NULL)  break;        if (mod & KMOD_CTRL)            RemoveSection();        else        {            (*m_SelectedSection)->Remove();            if ( (*m_SelectedSection)->Empty() )                RemoveSection();        }        DeselectSection();        break;    /// CAMERA CONTROLS    case SDLK_LEFT:        m_Camera.Scroll(-5, 0);        break;    case SDLK_RIGHT:        m_Camera.Scroll(5, 0);        break;    case SDLK_UP:        m_Camera.Scroll(0, -5);        break;    case SDLK_DOWN:        m_Camera.Scroll(0, 5);        break;    case SDLK_PAGEUP:        m_Camera.Zoom(2.0);        ResizeNormals(m_NormalSize*0.5 / m_Camera.Scale() );        break;    case SDLK_PAGEDOWN:        m_Camera.Zoom(0.5);        ResizeNormals(m_NormalSize*2.0 / m_Camera.Scale() );        break;    }}// Called once when a key is released.void GameManager::KeyUp(int key, int mod){	switch (key)	{    /// MAP CONTROLS    /// CAMERA CONTROLS	case SDLK_LEFT:        m_Camera.Stop(X);        break;	case SDLK_RIGHT:        m_Camera.Stop(X);        break;	case SDLK_UP:        m_Camera.Stop(Y);        break;	case SDLK_DOWN:        m_Camera.Stop(Y);        break;	}}// Called every time the mouse moves.void GameManager::MouseMotion(int button,                              int x,    int y,                              int relX, int relY ){    // Do not accept input outside work area.    if (x > m_WorkWidth || y > m_WorkHeight)  return;    Vector2D pos(x, y);    // Transform to world coordinates.    m_Camera.Transform(pos.x, pos.y);    // Do not accept input outside world area.    if (pos.x > m_WorldWidth || pos.y > m_WorldHeight)  return;    if (m_SelectedSection == NULL)  return;    // Left mouse button is pressed.    if ( button & SDL_BUTTON(1) )    {        if (SDL_GetModState() & KMOD_ALT)            (*m_SelectedSection)->Stretch( relY / m_Camera.Scale() );        else if (SDL_GetModState() & KMOD_SHIFT)            (*m_SelectedSection)->Rotate( relX / (50.0 * m_Camera.Scale()) );        else            (*m_SelectedSection)->Translate( Vector2D(relX, relY) / m_Camera.Scale() );    }}// Called once when a mouse button is pressed.void GameManager::MouseButtonDown(int button,                                  int x,    int y,                                  int relX, int relY ){    // Do not accept input outside work area.    if (x > m_WorkWidth || y > m_WorkHeight)  return;    Vector2D pos(x, y);    // Transform to world coordinates.    m_Camera.Transform(pos.x, pos.y);    // Do not accept input outside world area.    if (pos.x > m_WorldWidth || pos.y > m_WorldHeight)  return;    switch (button)    {        case SDL_BUTTON_LEFT:            if (SDL_GetModState() & KMOD_CTRL)            {                // If there is no selected track, create a new one.                if (m_SelectedSection == NULL)                {                    boost::shared_ptr<ComponentListBase> cl;                    switch (m_Mode)                    {                        case MD_TRACK:                            cl = boost::shared_ptr<Track>(new Track);                            break;                        case MD_PATH:                            cl = boost::shared_ptr<VertexList>(new VertexList);                            break;                        case MD_STARTS:                            cl = boost::shared_ptr<StartList>(new StartList);                            break;                        default:                            throw RuntimeError("Undefined mode.", __LINE__, __FILE__);                    }                    m_Sections.push_back(cl);                    SelectSection( Last(m_Sections) );                }                (*m_SelectedSection)->Insert(pos);            }            break;        case SDL_BUTTON_RIGHT:            // Remember the coordinates of the click.            m_ClickPos = pos;            break;    }}// Called once when a mouse button is released.void GameManager::MouseButtonUp(int button,                                int x,    int y,                                int relX, int relY ){    // Do not accept input outside work area.    if (x > m_WorkWidth || y > m_WorkHeight)  return;    Vector2D pos(x, y);    // Transform to world coordinates.    m_Camera.Transform(pos.x, pos.y);    // Do not accept input outside world area.    if (pos.x > m_WorldWidth || pos.y > m_WorldHeight)  return;    switch (button)    {        case SDL_BUTTON_LEFT:            break;        case SDL_BUTTON_RIGHT:            // Margin of error for selecting track segments.            double radius = 5.0 / m_Camera.Scale();            // If control is held, add to current selection.            if (SDL_GetModState() & KMOD_CTRL)            {                if (m_SelectedSection == NULL)  return;                // If the release was close to the press, do not treat as a                // rectangular selection.                if (pos.DistanceSq(m_ClickPos) < 25.0)                {                    // Select a track segment at mouse position.                    (*m_SelectedSection)->SetSelection(pos, radius,                                          ComponentListBase::SELECT);                }                // If the release was far from the press, the selection is a                // rectangle.                else                {                    // Create a selection rectangle and use it to select.                    Rectangle rect( MinOf(pos.x, m_ClickPos.x),    // left                                    MinOf(pos.y, m_ClickPos.y),    // top                                    MaxOf(pos.x, m_ClickPos.x),    // right                                    MaxOf(pos.y, m_ClickPos.y) );  // bottom                    (*m_SelectedSection)->SetSelection(rect,                                          ComponentListBase::SELECT);                }  // Rectangular selection            }            // If control is not held, replace the current selection.            else            {                if (m_SelectedSection != NULL)                    (*m_SelectedSection)->DeselectAll();                // If the release was close to the press, do not treat as a                // rectangular selection.                if (pos.DistanceSq(m_ClickPos) < 25.0)                {                    // Search through all sections for a matching segment.                    SectRItr s;                    for (s = m_Sections.rbegin(); s != m_Sections.rend(); )                    {                        ++s;                    	bool selected = ( *s.base() )->SetSelection(pos, radius,                                                       ComponentListBase::SELECT);                        if (selected)                        {                            SelectSection( s.base() );                            break;                        }                        DeselectSection();                    }                }                // If the release was far from the press, the selection is a                // rectangle.                else                {                    // Create a selection rectangle and use it to select.                    Rectangle rect( MinOf(pos.x, m_ClickPos.x),    // left                                    MinOf(pos.y, m_ClickPos.y),    // top                                    MaxOf(pos.x, m_ClickPos.x),    // right                                    MaxOf(pos.y, m_ClickPos.y) );  // bottom                    // Ends up true if a selection was made.                    bool selected = false;                    // Search through all tracks for a matching segment.                    SectRItr s;                    for (s = m_Sections.rbegin(); s != m_Sections.rend(); )                    {                        ++s;                    	selected = ( *s.base() )->SetSelection(rect,                                                  ComponentListBase::SELECT);                        if (selected)                        {                            SelectSection( s.base() );                            break;                        }                        DeselectSection();                    }                }  // Rectangular selection            }  // Control not held down            break;    }  // Switch button}// Unpause game.void GameManager::WindowActive(){}// Pause game.void GameManager::WindowInactive(){}// Clean up at the end of the game.void GameManager::End(){}void GameManager::ToggleLooped(){    if (m_SelectedSection == NULL)        return;    (*m_SelectedSection)->ToggleLooped();}void GameManager::ToggleDirection(){    if (m_SelectedSection == NULL)        return;    (*m_SelectedSection)->Reverse();}void GameManager::ShowComponents(bool show){    SectItr sect;    for (sect = m_Sections.begin(); sect != m_Sections.end(); ++sect)        (*sect)->ShowComponents(show);}void GameManager::ShowConnections(bool show){    SectItr sect;    for (sect = m_Sections.begin(); sect != m_Sections.end(); ++sect)        (*sect)->ShowConnections(show);}void GameManager::ResizeNormals(double) {}