After upgrading Clojurescript '1.9.494' getting JSC_PARSE_ERROR

Question

After upgrading my Clojurescript version 1.8.51 to 1.9.494 I'm getting the following error:

And it says Successfully compiled but it does not reflect the new code.

ertugrulcetin@Ertugruls-MacBook-Pro ~/I/my-app> lein cljsbuild once min
Compiling ClojureScript...
Compiling "resources/public/js/app.js" from ["src/cljs"]...
Apr 10, 2017 1:43:11 AM com.google.javascript.jscomp.LoggerErrorManager println
SEVERE: /Users/ertugrulcetin/IdeaProjects/my-app/target/cljsbuild-compiler-0/cljs/core/async.js:1426: ERROR - Parse error. No newline allowed before '=>'
var inst_15586 = async(inst_15585);
                                  ^

    Apr 10, 2017 1:43:11 AM com.google.javascript.jscomp.LoggerErrorManager printSummary
    WARNING: 1 error(s), 0 warning(s)
    ERROR: JSC_PARSE_ERROR. Parse error. No newline allowed before '=>' at /Users/ertugrulcetin/IdeaProjects/my-app/target/cljsbuild-compiler-0/cljs/core/async.js line 1426 : 34

Successfully compiled "resources/public/js/app.js" in 11.472 seconds.

When I switch to 1.8.51 version everything just works fine.

Answer 1

This is a bug in closure-compiler . It's been fixed, but we're just waiting on the next version to be released.

Edit: It has now been released - version 20170409