RangeError.js

//CHECK#1
try {
  var x = [];
  x.length = NaN;
  $ERROR('#1.1: x = []; x.length = NaN throw RangeError. Actual: x.length === ' + (x.length));
} catch(e) {    
  if ((e instanceof RangeError) !== true) {
    $ERROR('#1.2: x = []; x.length = NaN throw RangeError. Actual: ' + (e));
  }    
}

//CHECK#4
try {
  x = [];
  x.length = undefined;
  $ERROR('#4.1: x = []; x.length = undefined throw RangeError. Actual: x.length === ' + (x.length));
} catch(e) {    
  if ((e instanceof RangeError) !== true) {
    $ERROR('#4.2: x = []; x.length = undefined throw RangeError. Actual: ' + (e));
  }    
}