Some computer programs crash - just as some possible superintelligences would kill alll humans.
However, the behavior of a computer program chosen at random tells you very little about how an actual real-world computer program will behave - since computer programs are typically produced by selection processes performed by intelligent agents.
The "for almost any goals" argument is bunk.
Some computer programs crash - just as some possible superintelligences would kill all humans.
No most computer programs crash, it's just that most people never see them because said programs are repeatedly tested and modified until they no longer crash before being shown to people (this process is called "debugging"). With a self-modifying AI this is a lot harder to do.
From Geoff Anders of Leverage Research:
Not a surprising result, perhaps, but the details of how Geoff taught AGI danger and the reactions of his students are quite interesting.