https://github.com/clojure/core.async 1.6.681 is now available • Reverts the change from https://clojure.atlassian.net/browse/ASYNC-248 in the last release which exposed issues detailed in https://clojure.atlassian.net/browse/ASYNC-249 (aka "NoSuchFieldError thunk__0__"). These are really ultimately Clojure compiler issues, but until we have a chance to get to those we've rolled this back.