UglifyJS getting errors

[couturecraigj]

I have been trying out WebAssembly and the wargo build is working well but I would really like to see if I can get this to work with uglify.
this is my error

Invalid assignment [./~/wargo-loader??ref--0!./src/main.rs:5,0][main_d6f3bb21cd455f866c7c.js:86707,47]

and this is what I am doing with my code before all that nonsense hashing.

if (typeof WebAssembly === 'object') {
  if (process.env.NODE_ENV === 'development') {
    setTimeout(() => {
      UberFunctions = getBinaryFunctions(window.Module)
      window.UberFunctions = UberFunctions
    }, 1000)
  } else {
    const wasm = require('../src/main.rs')
    wasm.initialize({ noExitRuntime: true })
    .then(mod => {
      UberFunctions = getBinaryFunctions(mod)
      window.UberFunctions = UberFunctions
      console.log(UberFunctions.add(1, 2), UberFunctions.subtract(5, 4), UberFunctions.multiply(20, 500), UberFunctions.divide(24.48, 400), 24.48 / 400)
    })
  }
  setTimeout(() => {
    console.log(UberFunctions.add(1, 2), UberFunctions.subtract(5, 4), UberFunctions.multiply(20, 500), UberFunctions.divide(24.48, 400), 24.48 / 400)
  }, 1000)
}

Do you have any suggestions. Makes building rust to WASM super fast great tool!