Martin Atkins 4e18e3a8a8 zcl: allow nil Variables in EvalContext
it's acceptable to have "Variables" set to nil in an EvalContext, if
a particular scope has no variables at all. If _no_ contexts in the
chain have non-nil variables, this is considered to mean that variables
are not allowed at all, which produces a different error message.
2017-06-16 07:15:14 -07:00
..
2017-05-19 19:33:58 -07:00