text: // number unless otherwise specified
  var n1 = n1++;
  var n2 = n2 + n2;
  var n3 /* any */  = n3 + n3;
  // string unless otherwise specified
  var s1 = s1 + "";
  var s2 /* any */  = s2 + s2;
  var s3 = s3 + s3;
  var s4 = "" + s4;
  // boolean unless otherwise specified
  var b1 = !b1;
  var b2 = !!b2;
  var b3 = !b3 || b3; // expected boolean here. actually 'any'
  var b4 = !b4 && b4; // expected boolean here. actually 'any'
  // (x:string) => any
  var f = function(x) {
      return f(x);
  };
  