I've been playing with large streams, lists and vectors of primes for the past couple of days and have seen the following behavior on my Win7 system 3 times:
In the middle of a memory intensive operation the disk will start to rattle and the system will be slower (I measured with (time) about a 30% slow down) after several more operations suddenly DrRacket will become unresponsive and Win7 will "search for a solution to the problem" which I cancel. After about 5 minutes of furious disk rattling the DrRacket session will terminate without a message, but the disk will continue to thrash for about another 15 minutes. I'm using version 5.2.1 -Joe
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