[ANN] Clojure 1.9.0-alpha15 is now available

[Alex Miller]

Clojure 1.9.0-alpha15 is now available.

Try it via

- Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.9.0-alpha15

- Leiningen: [org.clojure/clojure "1.9.0-alpha15"]

1.9.0-alpha15 includes the following changes since 1.9.0-alpha14:

- CLJ-1793 - reducer instances hold onto the head of seqs (also applies to a broader set of head-holding cases)

- CLJ-2043 - s/form of conformer is broken

- CLJ-2035 - s/form of collection specs are broken

- CLJ-2100 - s/form of s/nilable should include the original spec, not the resolved spec

Specs:

- CLJ-2062 - added specs for `import` and `refer-clojure`

- CLJ-2114 - ::defn-args spec incorrectly parses map body as a prepost rather than function body

- CLJ-2055 - binding-form spec parses symbol-only maps incorrectly

Infrastructure:

- CLJ-2113 - Clojure maven build updated

[Alex Miller]

Looks like while CLJ-1793 was ok'ed for this alpha, it was missed when the patches were applied, so that one will not be in until the next alpha. Whoops!

[Dmitri]

looks like the latest core.async fails Spec validation with alpha15:

Caused by: clojure.lang.ExceptionInfo: Call to clojure.core/refer-clojure did not conform to spec:

In: [2] val: (quote :as) fails at: [:args :exclude :op :spec] predicate: #{:exclude}

In: [2 1] val: :as fails at: [:args :exclude :op :quoted-spec :spec] predicate: #{:exclude}

In: [2] val: (quote :as) fails at: [:args :only :op :spec] predicate: #{:only}

In: [2 1] val: :as fails at: [:args :only :op :quoted-spec :spec] predicate: #{:only}

In: [2] val: (quote :as) fails at: [:args :rename :op :spec] predicate: #{:rename}

In: [2 1] val: :as fails at: [:args :rename :op :quoted-spec :spec] predicate: #{:rename}

:clojure.spec/args  ((quote :exclude) (quote [reduce transduce into merge map take partition partition-by bounded-count]) (quote :as) (quote core))

 {:clojure.spec/problems ({:path [:args :exclude :op :spec], :pred #{:exclude}, :val (quote :as), :via [], :in [2]} {:path [:args :exclude :op :quoted-spec :spec], :pred #{:exclude}, :val :as, :via [], :in [2 1]} {:path [:args :only :op :spec], :pred #{:only}, :val (quote :as), :via [], :in [2]} {:path [:args :only :op :quoted-spec :spec], :pred #{:only}, :val :as, :via [], :in [2 1]} {:path [:args :rename :op :spec], :pred #{:rename}, :val (quote :as), :via [], :in [2]} {:path [:args :rename :op :quoted-spec :spec], :pred #{:rename}, :val :as, :via [], :in [2 1]}), :clojure.spec/args ((quote :exclude) (quote [reduce transduce into merge map take partition partition-by bounded-count]) (quote :as) (quote core))}, compiling:(clojure/core/async.clj:9:1)

[Alex Miller]

Yes, this is a bad use of refer-clojure which fails with the new spec. It has been fixed and a release job for core.async is waiting on the build box.

[Dmitri]

👍