Properties that return v128 cause compiler error even though they are conditionally used

[jtenner]

class ExampleClass {
  a: f64;
  b: f64;

  get ab(): v128 {
    return v128.load(changetype<usize>(this), offsetof<ExampleClass>("a"));
  }
}

if (!ASC_FEATURE_SIMD) {
  let a = new ExampleClass();
  a.a = 1;
}

Minimal reproduction causes a compiler error that reports like this:

  ERROR TS2304: Cannot find name 'v128'.

     get ab(): v128 {
               ~~~~
   in simd-error.ts(6,12)

[jtenner]

Any news on this? I think I can to take a stab at this problem.