webpack code splitting error

I'm sure this code is generated by webpack for the electron main target

This is the code at the very top of the bundle, and my app throws an error right away on line 34

```javascript
(module.exports = (function(t) {
var e = {},
n = { 1: 0 }
function r(n) {
if (e[n]) return e[n].exports
var i = (e[n] = { i: n, l: !1, exports: {} })
return t[n].call(i.exports, i, i.exports, r), (i.l = !0), i.exports
}
return (
(r.e = function(e) {
var r = [],
i = n[e]
if (0 !== i)
if (i) r.push(i[2])
else {
var o = new Promise(function(r, o) {
i = n[e] = [r, o]
var a = __dirname + '/' + ({}[e] || e) + '.bundle.js'
require('fs').readFile(a, 'utf-8', function(e, r) {
if (e) return o(e)
var i = {}
require('vm').runInThisContext(
'(function(exports, require, __dirname, __filename) {' + r + '\n})',
a
)(i, require, require('path').dirname(a), a)
var s = i.modules,
u = i.ids /** THIS BLOWS UP. IT IS UNDEFINED for any of the code splitting chunks **/
for (var c in s) t[c] = s[c]
for (var l = [], f = 0; f < u.length; f++)
n[u[f]] && (l = l.concat(n[u[f]][0])), (n[u[f]] = 0)
for (f = 0; f < l.length; f++) l[f]()
})
})
r.push((i[2] = o))
}
return Promise.all(r)
})
```

this part specifically

```javascript
require('vm').runInThisContext(
'(function(exports, require, __dirname, __filename) {' + r + '\n})',
a
)(i, require, require('path').dirname(a), a)
var s = i.modules,
u = i.ids

```

i.ids is undefined.

if I hand edit this i can avoid seeing the error and my app functions normally.

how can i have any influence over this behavior in my code?