const_test.dart

void main() {
  var nums1 = [1, 2, 3];
  nums1[1] = 99; // valid
  print(nums1[1]);
  
  const nums2 = [1, 2, 3];
  nums2[1] = 99; // invalid: runtime error
  print(nums2[1]);
  
  var nums3 = const [1, 2, 3];
  nums3[1] = 99; // invalid: also runtime error (not compile-time error???)
  print(nums3[1]);
}