Fails with (uglify plugin) TypeError: regex.test is not a function

[pvdlg]

When passing an Uglify option that is a regex, Uglify fails with error TypeError: regex.test is not a function as it seems rollup-plugin-uglify somehow transform regexps into strings.
It might happen when passing the option object to the jest-worker.

Here is the config to reproduce:

import { rollup } from "rollup";
import { uglify } from "rollup-plugin-uglify";

rollup({
  input: "main.js",
  plugins: [uglify({mangle: {properties: {regex: /^_/}}})]
});

[TrySound]

I get it. Thanks for reporting. Could you use v4 for now?

[pvdlg]

Yes sure, I'll keep using v4 until this is fixed.
Not sure what the solution is though. If it's indeed due to the way option are passed through jest-worker, that might create an issue for each property that is not a String (not only the mangle property regex).

[xt0rted]

I just ran into a similar issue. Passing a regex to options.comments causes all comments to be left in the file, and if I try a function it doesn't get called. Downgrading to v4 works as expected. The same issue exists in rollup-plugin-terser@2.

[TrySound]

Gonna fix after next rollup release with new lifecycle hooks

[TrySound]

Fixed in https://github.com/TrySound/rollup-plugin-uglify/releases/tag/v6.0.0