[go-nuts] Creative range code to implicitly confirm equal length slices

I often write code that uses "tables" of data, which are represented by
slices of slices but each inner slice has the same length. Is there any way
to write a range loop such that it implicitly confirms that each slice is
of the same length without having to actually do length checks? For example,

http://play.golang.org/p/qDmYLAh-UO

will panic if len(s1) < len(s2), but will behave just fine if len(s1) >
len(s2). I'm wondering if I can construct this so it will panic in either
case without increasing runtime computational cost.

Thanks