fread с непонятной ошибкой

    FILE *t = fopen("squares.db","r");                            
    if (!t) {
        char log[1024];
        sprintf(log, "Error opening squares.db", argv[1]);
        SetReady(log);      
        return 1;
    }
    town_square *town=NULL;                                    
    vector<TOWN_SQUARE> squares;                           
    while (fread(town,sizeof(town_square),1,t)==1) {
        squares.push_back(*town);                               
    }
    fclose(t);

typedef struct point_town
{
    float x, y;
    point_town(float _x = 0.0f, float _y = 0.0f) { x = _x, y = _y; }
    bool operator == (const point_town& p){return (this->x == p.x && this->y == p.y);}
    bool operator != (const point_town& p){return !((*this) == p);}
} POINT_TOWN;
 
typedef struct town_square
{
    point_town min,max;
    char file_name[32];
    town_square(point_town _min, point_town _max, char _file_name[32]) { min.x=_min.x; min.y=_min.y; max.x=_max.x; max.y=_max.y; 
      memset(_file_name,0,sizeof(file_name)*sizeof(file_name[0]));
}
} TOWN_SQUARE;

town_square *town=NULL;

town_square *town;

town_square *town;

town_square town=new town_square((0.0f,0.0f),(0.0f,0.0f),"");

town_square(point_town _min, point_town _max, char _file_name[32]) { min.x=_min.x; min.y=_min.y; max.x=_max.x; max.y=_max.y; 
      memset(_file_name,0,sizeof(file_name)*sizeof(file_name[0]));

town_square *town = new town_square((0.0f,0.0f),(0.0f,0.0f),"");

town_square town=town_square((0.0f,0.0f),(0.0f,0.0f),"");

point_town(float _x = 0.0f, float _y = 0.0f) { x = _x, y = _y; }

point_town(float _x = 0.0f, float _y = 0.0f) { x = _x; y = _y; }

fread(&town,sizeof(town_square),1,t)