system.string

[nrk]

Your type signature looks a bit strange. `Table[string, [seq[int]]]` should 
probably be `Table[string, seq[int]]` (without the brackets around `seq[int]`); 
the former appears to be interpreted as a single-element array of 
`typedesc[seq[int]]`'s, which you can't even pass to Table in the first place.