Cannot read property 'code' of undefined

I encounter some problems with meteor-wisp. I have a basic meteor application, freshly generated with a meteor create.

If I create a dummy wisp file (even an empty one) I'm getting the following message when I run the server with meteor.

=> Modified -- restarting.                    
console.log('Hello from wisp');              /
//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImFub255bW91cy53aXNwIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUFNQSxPQUFMLENBQUNDLEdBQUYsQ0FBYyxpQkFBZCIsInNvdXJjZXNDb250ZW50IjpbIigubG9nIGNvbnNvbGUgXCJIZWxsbyBmcm9tIHdpc3BcIilcbiJdfQ==
console.log('Hello from wisp');              /
//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImFub255bW91cy53aXNwIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUFNQSxPQUFMLENBQUNDLEdBQUYsQ0FBYyxpQkFBZCIsInNvdXJjZXNDb250ZW50IjpbIigubG9nIGNvbnNvbGUgXCJIZWxsbyBmcm9tIHdpc3BcIilcbiJdfQ==
=> Errors prevented startup:                  

   While building the application:
   packages/compileWisp/plugin/compile-wisp.js:49:1: Cannot read property
   'code' of undefined (compiling test.wisp) (at handler)

=> Your application has errors. Waiting for file change.

My very simple test code

(.log console "Hello from wisp")

MixinLabs / meteor-wisp

Cannot read property 'code' of undefined #3