Specifically, throw an explicit IllegalArgumentException if 'len' is negative, rather than falling over in some other way further down the line. Change-Id: If955de7ec1a15aa9aa8c42b6994b059e0cdffcee
Specifically, throw an explicit IllegalArgumentException if 'len' is negative, rather than falling over in some other way further down the line. Change-Id: If955de7ec1a15aa9aa8c42b6994b059e0cdffcee