Failed to Uglify using webpack

[ghost]

I have read the docs, and made sure that my webpack Uglify entry looks like this:

    new webpack.optimize.UglifyJsPlugin({
      compress: { warnings: false, unused: false, comparisions: false },
      output: { comments: false }
    }),

Still, here's the output I get if I try to make a build:

Creating an optimized production build...
Failed to compile.

Failed to minify the bundle. Error: static/js/main.531ae0c8.js from UglifyJs
Unexpected token: name (Tensor) [static/js/main.531ae0c8.js:734,6]

Any idea what might be causing this?

If it helps, my project is based of create-react-app.

[jkMey]

According to http://bit.ly/2tRViJ9

It seems the author did not compile the code to ES5 before publishing it to npm.

[ghost]

So, should I contact the other lib?

[jkMey]

I'd suggest compiling it yourself.