vite caching circular imports bug

1. Run pnpm i.
2. Run pnpm test.
3. Open your browser to the dev server.
4. Note that the page loads fine, and logs function b() - everything works.
5. Now, go to module_b.js and uncomment line 3, and save the file.

After you do this, the page now throws an error - for some reason, it's causing module_a to be imported twice. The only way to fix the dev server at this point is to either revert module_b to its original text, so it uses the old cached version, or to rm -rf ./node_modules/.vite and restart the dev server.

Restarts of the dev server without deleting the cache don't fix the error.