Streamline bug: order of precedence w/ comma operator

1-input_.coffee

thing =
  if id = input.id
    Thing.getById id, _
  else
    url = adjustURL input.url
    Thing.getByURL url, _

2-input_.js

var id, thing, url;
thing = (id = input.id) ? Thing.getById(id, _) : (url = adjustURL(input.url), Thing.getByURL(url, _));

3-output.js

(function main(_) {
  var id, thing, url;
  var __frame = {
    name: "main",
    line: 1
  };
  return __func(_, this, arguments, main, 0, __frame, function __$main() {
    return (function __$main(_) {
      var __1 = (id = input.id);
      return (function __$main(__then) {
        if (__1) {
          return Thing.getById(id, __cb(_, __frame, 1, 26, _));
        }
         else {
          __then();
        }
      ;
      })(function __$main() {
        return Thing.getByURL(url, __cb(_, __frame, 1, 78, function ___(__0, __4) {
          var __3 = (url = adjustURL(input.url), __4);
          return _(null, __3);
        }));
      });
    })(__cb(_, __frame, 7, 6, function ___(__0, __2) {
      thing = __2;
      _();
    }));
  });
}).call(this, __trap);