consolidation-at-read-time: errors like `json: error calling MarshalJSON for type main.Point: invalid character 'N' looking for beginning of value` at read time about metrictank HOT 3 CLOSED

the mem iters sometimes return points like

 (main.Point) {
    Val: (float64) NaN,
    Ts: (uint32) 1449027600
   }

from metrictank.

a confirmed cause of this is divide(0,0).
for the record, graphite handles this as follows:

def safeDiv(a,b):
  if a is None: return None
  if b in (0,None): return None
  return float(a) / float(b)

from metrictank.

closing this cause the fix is in the branch, and the problem likely doesn't exist in master.

from metrictank.