Issues using spec with new notebook features

[metasoarous]

The following code in a notebook produces an error:

(s/def ::probability
  (s/double-in :min 0 :max 1))

The error in oz logs:

java.lang.ClassCastException

My guess is this is a result of the macro expansion doing something weird at the analysis step, but it could also be trying to treat it as a hiccup form somehow. Will have to explore this in greater depth to figure out what is going on (no stack trace).