Bug report

What is the current behavior?
I was actually trying to make a minimal reproduction for #8677 and ended up with this error. I'm not sure if it's related or not. It seems to happen with some specific combination of static and dynamic imports between multiple entrypoints.

If the current behavior is a bug, please provide the steps to reproduce.

• checkout https://github.com/ArgonAlex/webpack-e-undefined
• run yarn
• run yarn test

What is the expected behavior?
I would expect __webpack_require__.e to be defined or not referenced. Disabling module concatenation causes it to be defined, but I don't know if that feature is the root cause of the issue.

Other relevant information:
webpack version: 4.41.2
Node.js version: 12
Operating System: OSX