[UDF] cannot use // comment style in JS udf

# cat pi.js 

function pi() {

  // some comment

  return 3.1415926;

} 

# curl -s -k -X POST http://172.23.104.91:8093/evaluator/v1/libraries/use_cases -u Administrator:password -H 'content-type: application/json' -d@pi.js

Error while compiling library. Cause:

compilation failed:

Exception: SyntaxError: Unexpected end of input

Location: functions/use_cases.js:1 

Code: function pi() {  // some comment  return 3.1415926;}

SyntaxError: Unexpected end of input