Error while running VM code in VMEmulator

[sarthak]

The snake game works fine. But if I let it run for sometime (for about a minute) it shows following error:
Program Halted: Heap Overflow.
How should I remove this error? snake.zip

[cadet1620]

sarthak wrote

The snake game works fine. But if I let it run for sometime (for about a minute) it shows following error:
Program Halted: Heap Overflow.

Your game has a "memory leak". Snake.Advance() keeps doing

        let prsntMove = Array.new(length);

but never calls

        do prsntMove.dispose();

This means that every time Advance() is called, a new instance of prsntMove is allocated from the heap and that memory is gone forever. Eventually you run out of heap.

Note: although not needed in your current game, all classes that create objects in their constructors should have a destructor ("method dispose()" in Jack) that destroys those objects.  Class Snake shoud get:

    method void dispose() {
        do x.dispose();
        do y.dispose();
        do Mov.dispose();
        return;
    }

--Mark