This isn’t only an optimisation but also a change in behaviour, isn’t it?
Clojure 1.9.0-alpha3: user=> (let [[x & xs] #{1 2 3}] x) UnsupportedOperationException nth not supported on this type: PersistentHashSet clojure.lang.RT.nthFrom (RT.java:948) Clojure 1.9.0-alpha4: user=> (let [[x & xs] #{1 2 3}] x) 1 Perhaps the documentation needs to be updated? http://clojure.org/reference/special_forms#_vector_binding_destructuring -- David -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.