clojure.walk.macroexpand-all will not properly expand macros that depend on &env

Question

(clojure.walk/macroexpand-all '(defn foo [a] (go [] a)))


Unhandled clojure.lang.ExceptionInfo
   Could not resolve var: a
   {:var a}

This is because go depends on &env and macroexpand-all does not handle &env.

The reason this issue is important is because it breaks the cider debugger for async.

Answer 1

Reference: https://clojure.atlassian.net/browse/CLJ-2011 (reported by alex+import)