Which applies not just to integer math, but also to floating point:

http://play.golang.org/p/vEmiqUyPag

Division by zero in floating point is well defined and useful, and does not produce a runtime exception. So why is this a compile time error?

Edit And it produces the wrong result for division by negative zero: http://play.golang.org/p/DKoVG0Vlaf It should be -Inf, not +Inf. Go's floating point math is whack.