Must use @babel/plugin-transform-runtime even though I am using it

[puchm]

• Rollup Plugin Name: Babel
• Rollup Plugin Version: 5.3.0
• Rollup Version: 2.44.0
• Operating System (or Browser): Win10 18363.1379
• Node Version: 12.18.2
• Link to reproduction (⚠️ read below): https://github.com/puchm/rollup-issue-demo
  Sorry, it's not using the Rollup REPL - it's very minimal though since I created it from scratch. I hope this is ok.

Expected Behavior

When @babel/plugin-transform-runtime is in the Babel plugins array inside .babelrc, the following error has no reason to appear as far as I'm concerned:

Error: You must use the `@babel/plugin-transform-runtime` plugin when `babelHelpers` is "runtime"

Actual Behavior

The above error message appears.

Additional Information

When making the reproduction repo I noticed that this issue pops up as soon as I add the Node resolve plugin. (babel.config.js, lines 17-19). When I remove those lines the error doesn't appear. Instead, it fails to resolve the import from main.ts to test.ts.

What is the issue here?

Thanks,
-Moritz

[solarjoker]

I got the same error

[stale]

Hey folks. This issue hasn't received any traction for 60 days, so we're going to close this for housekeeping. If this is still an ongoing issue, please do consider contributing a Pull Request to resolve it. Further discussion is always welcome even with the issue closed. If anything actionable is posted in the comments, we'll consider reopening it. ⓘ

[NateScarlet]

I just use

    pluginBabel({
      extensions,
      babelHelpers: 'runtime',
      skipPreflightCheck: true,
    }),

then build output seems correct