Example fails to compile when clojurescript and lein-cljsbuild versions are upgraded

[kahunamoore]

Steps to reproduce:

1. Clone examples repo
2. Change to the following dependencies:

:dependencies [ ...
[org.clojure/clojurescript "0.0-2371"] ;2156 - original
...]

:plugins [[lein-cljsbuild "1.0.3"]] ;1.0.0 - original

3. Expected: Successful compile
4. Observed: NullPointerException - see below

---

$ git clone https://github.com/rbrush/clara-examples.git
Cloning into 'clara-examples'...
remote: Counting objects: 151, done.
remote: Total 151 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (151/151), 20.12 KiB | 0 bytes/s, done.
Resolving deltas: 100% (50/50), done.
Checking connectivity... done.
$ cd clara-examples
$ lein cljsbuild once
Compiling ClojureScript.
Compiling "resources/public/js/examples.js" from ["src/main/clojurescript"]...
Jan 25, 2015 11:09:17 PM com.google.javascript.jscomp.LoggerErrorManager println
WARNING: /Users/alanm/projects/clara-examples/target/cljsbuild-compiler-0/schema/core.js:853: WARNING - References to the global RegExp object prevents optimization of regular expressions.
schema.core.Regex = RegExp;
                    ^

Jan 25, 2015 11:09:17 PM com.google.javascript.jscomp.LoggerErrorManager printSummary
WARNING: 0 error(s), 1 warning(s)
Successfully compiled "resources/public/js/examples.js" in 40.734713 seconds.

$ lein clean
Deleting files generated by lein-cljsbuild.

$ echo changed project.clj
changed project.clj

$ lein cljsbuild once
Compiling ClojureScript.
Compiling "resources/public/js/examples.js" from ["src/main/clojurescript"]...
Compiling "resources/public/js/examples.js" failed.
clojure.lang.ExceptionInfo:  {:tag :cljs/analysis-error}
    at clojure.core$ex_info.invoke(core.clj:4327)
    at cljs.analyzer$error.invoke(analyzer.clj:287)
    at cljs.analyzer$analyze.invoke(analyzer.clj:1571)
    at cljs.analyzer$parse_ns$fn__1755$fn__1756.invoke(analyzer.clj:1642)
    at cljs.analyzer$parse_ns$fn__1755.invoke(analyzer.clj:1642)
    at cljs.analyzer$parse_ns.invoke(analyzer.clj:1637)
    at cljs.analyzer$parse_ns.invoke(analyzer.clj:1632)
    at cljs.compiler$compile_root.invoke(compiler.clj:1005)
    at cljs.closure$compile_dir.invoke(closure.clj:343)
    at cljs.closure$eval3071$fn__3072.invoke(closure.clj:383)
    at cljs.closure$eval3006$fn__3007$G__2997__3014.invoke(closure.clj:293)
    at cljs.closure$eval3058$fn__3059.invoke(closure.clj:397)
    at cljs.closure$eval3006$fn__3007$G__2997__3014.invoke(closure.clj:293)
    at cljsbuild.compiler.SourcePaths$fn__3269.invoke(compiler.clj:44)
    at clojure.core$map$fn__4207.invoke(core.clj:2485)
    at clojure.lang.LazySeq.sval(LazySeq.java:42)
    at clojure.lang.LazySeq.seq(LazySeq.java:60)
    at clojure.lang.RT.seq(RT.java:484)
    at clojure.core$seq.invoke(core.clj:133)
    at clojure.core$apply.invoke(core.clj:617)
    at clojure.core$mapcat.doInvoke(core.clj:2514)
    at clojure.lang.RestFn.invoke(RestFn.java:423)
    at cljsbuild.compiler.SourcePaths._compile(compiler.clj:44)
    at cljs.closure$build.invoke(closure.clj:962)
    at cljs.closure$build.invoke(closure.clj:928)
    at cljsbuild.compiler$compile_cljs$fn__3280.invoke(compiler.clj:58)
    at cljsbuild.compiler$compile_cljs.invoke(compiler.clj:57)
    at cljsbuild.compiler$run_compiler.invoke(compiler.clj:159)
    at user$eval3406$iter__3424__3428$fn__3429$fn__3441.invoke(form-init1116806015832199295.clj:1)
    at user$eval3406$iter__3424__3428$fn__3429.invoke(form-init1116806015832199295.clj:1)
    at clojure.lang.LazySeq.sval(LazySeq.java:42)
    at clojure.lang.LazySeq.seq(LazySeq.java:60)
    at clojure.lang.RT.seq(RT.java:484)
    at clojure.core$seq.invoke(core.clj:133)
    at clojure.core$dorun.invoke(core.clj:2780)
    at clojure.core$doall.invoke(core.clj:2796)
    at user$eval3406.invoke(form-init1116806015832199295.clj:1)
    at clojure.lang.Compiler.eval(Compiler.java:6619)
    at clojure.lang.Compiler.eval(Compiler.java:6609)
    at clojure.lang.Compiler.load(Compiler.java:7064)
    at clojure.lang.Compiler.loadFile(Compiler.java:7020)
    at clojure.main$load_script.invoke(main.clj:294)
    at clojure.main$init_opt.invoke(main.clj:299)
    at clojure.main$initialize.invoke(main.clj:327)
    at clojure.main$null_opt.invoke(main.clj:362)
    at clojure.main$main.doInvoke(main.clj:440)
    at clojure.lang.RestFn.invoke(RestFn.java:421)
    at clojure.lang.Var.invoke(Var.java:419)
    at clojure.lang.AFn.applyToHelper(AFn.java:163)
    at clojure.lang.Var.applyTo(Var.java:532)
    at clojure.main.main(main.java:37)
Caused by: java.lang.NullPointerException
    at cljs.core$import_macros$fn__3479.invoke(core.clj:49)
    at clojure.core$map$fn__4207.invoke(core.clj:2485)
    at clojure.lang.LazySeq.sval(LazySeq.java:42)
    at clojure.lang.LazySeq.seq(LazySeq.java:60)
    at clojure.lang.RT.seq(RT.java:484)
    at clojure.core$seq.invoke(core.clj:133)
    at clojure.core$map$fn__4211.invoke(core.clj:2490)
    at clojure.lang.LazySeq.sval(LazySeq.java:42)
    at clojure.lang.LazySeq.seq(LazySeq.java:67)
    at clojure.lang.RT.seq(RT.java:484)
    at clojure.core$seq.invoke(core.clj:133)
    at clojure.core$concat$cat__3925$fn__3926.invoke(core.clj:687)
    at clojure.lang.LazySeq.sval(LazySeq.java:42)
    at clojure.lang.LazySeq.seq(LazySeq.java:60)
    at clojure.lang.Cons.next(Cons.java:39)
    at clojure.lang.RT.next(RT.java:598)
    at clojure.lang.Compiler.eval(Compiler.java:6606)
    at clojure.lang.Compiler.load(Compiler.java:7064)
    at clojure.lang.RT.loadResourceScript(RT.java:370)
    at clojure.lang.RT.loadResourceScript(RT.java:361)
    at clojure.lang.RT.load(RT.java:440)
    at clojure.lang.RT.load(RT.java:411)
    at clojure.core$load$fn__5018.invoke(core.clj:5530)
    at clojure.core$load.doInvoke(core.clj:5529)
    at clojure.lang.RestFn.invoke(RestFn.java:408)
    at cljs.analyzer$load_core.invoke(analyzer.clj:229)
    at cljs.analyzer$analyze$fn__1738.invoke(analyzer.clj:1577)
    at cljs.analyzer$analyze.invoke(analyzer.clj:1573)
    ... 48 more
Subprocess failed

[rbrush]

I think this is fixed in the commit below, and available on clara-rules-0.9.0-SNAPSHOT up on the Sonatype snapshot repository. I also updated clara-examples to pull in that version of clara-rules and a newer version of ClojureScript.

I didn't track down the above stack trace, but found that clara-rules broke when upgrading ClojureScript because of a small change ClojureScript had to some of its internal structure. The commit linked below fixed it and appears to fix the above problem as well.

oracle-samples/clara-rules@d3f08b6

[kahunamoore]

Yes, this fixed it - thanks!

Closing...