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struct Point
{
int x;
int y;
};

struct Rect
{
struct Point lt;
struct Point rt;
struct Point lb;
struct Point rb;
};
void main( void )
{
    struct Rect *rc = (struct Rect *)malloc(sizeof(struct Rect));
    rc->lb.x = 1;
    free(rc);
    rc = 0;
}
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}
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