The only time I've ever seen the debugger dropout as described here ( as opposed to hanging completely as Josh describes which I see all too often ) is when I've done something which has caused the stack to overflow. Either recursion which is very deep or just an endless loop.
In this case, it looks like you're looping through an array. By any chance are you changing the size of said array within that loop?
In this case, it looks like you're looping through an array. By any chance are you changing the size of said array within that loop?