Bug report

What is the current behavior?

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

I have code like this:

import Class from "@namespace/package";

export default class extends Class {}

After updated to webpack v5.101.0 it throws me a run-time error, that extends operator expects function as parameter.

console.log( Class ) shows undefined value.

This problem introduced in v5.101.0, in the previous release v5.100.2 no errors detected.

I have no ides how to debug this.

Do you have any suggestions?

What is the expected behavior?

I am expecting that module will be imported and default export will be accessible.

Other relevant information:
webpack version: v5.101.0
Node.js version: v22.18.0
Operating System: Windows
Additional tools: