;; the reference.
(check-var proc v-env)
(for-each (cut check-var <> v-env) arg))
+ (($ $branch kt ($ $primcall (? symbol? name) (arg ...)))
+ (check-var kt k-env)
+ (for-each (cut check-var <> v-env) arg))
+ (($ $branch kt ($ $values (arg ...)))
+ (check-var kt k-env)
+ (for-each (cut check-var <> v-env) arg))
(($ $primcall (? symbol? name) (arg ...))
(for-each (cut check-var <> v-env) arg))
(($ $values (arg ...))