ESM Modules implementations leak memory

[SimenB]

🐛 Bug Report

The new experimental implementation leaks memory.

To Reproduce

Steps to reproduce the behavior:

Using node 13 or 14 (for unflagged ESM)

$ git clone git@github.com:facebook/jest.git
$ cd jest
$ yarn
$ cd e2e/native-esm
$ node --experimental-vm-modules ../../packages/jest/bin/jest.js --detect-leaks

Expected behavior

It should not leak

Link to repl or repo (highly encouraged)

This repo

[grosto]

I had a look and it seems that the issue is with Node. The references to SourceTextModule are not cleaned up properly. I will look into it more, but 90% that's it. I will open an issue in Node if it's true and will mention this issue.

[grosto]

SourceTextModule never get collected by GC and thus everything they hold reference too.
Here is the issue: nodejs/node#33439

[SimenB]

Thanks @grosto!

[github-actions]

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