Confusing error report in case of typos in configuration file

[myrosia]

I had a typo in my configuration file (an extra comma). This resulted in the following exception

    com.typesafe.sbt.jse.SbtJsTask$JsTaskFailure: 
undefined:7
}
^
SyntaxError: Unexpected token }
    at Object.parse (native)
    at /afs/inf.ed.ac.uk/user/m/mdzikovs/research/ideal/software/gui/play-upgrade-branch/project/target/jshint/sbt-jshint-1.0.3.jar:30:24
    at Object.<anonymous> (/afs/inf.ed.ac.uk/user/m/mdzikovs/research/ideal/software/gui/play-upgrade-branch/project/target/jshint/sbt-jshint-1.0.3.jar:67:2)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)                                                                                                               
    at node.js:906:3

Eventually I figured out that the cause was coming from from jshint-shell.js line 30
var options = JSON.parse(stripJsonComments(args[OPTIONS_ARG]));

This helped me find the source (configuration file error). But it would be better if it was reported properly, because it is impossible to guess from the error message what the cause is.