Global externals can leak into es bundle when using multiple targets

[such]

Hello,

I created a minimal project that reproduces the issue : https://github.com/such/test-rollup.

My project b depends on a class from project a:

import { A } from 'a';

export default function() {
  const myA = new A();
  myA.print();
  console.log('In module b');
}

The output file from building an es bundle of b together with an umd bundle is:

import { A } from 'a';

function index() {
  const myA = new a.A();
                 ^^^
  myA.print();
  console.log('In module b');
}

export default index;

even though when we only build the es bundle we get the correct output:

import { A } from 'a';

function index() {
  const myA = new A();
  myA.print();
  console.log('In module b');
}

export default index;

Let me know if you need more information.

[Rich-Harris]

Thanks for the test repo, very helpful – have opened #885

[Rich-Harris]

Fixed in 0.34.11