incorrect tree shaking with import * as foo + export default foo

[sapphi-red]

Rollup Version

3.7.4

Operating System (or Browser)

stackblitz

Node Version (if applicable)

No response

Link To Reproduction

https://stackblitz.com/edit/rollup-template-vg2pmh?file=src%2Fmain.js

Expected Behaviour

Running the bundled file output

hello from greetings
hi from greetings

as before bundled.

Actual Behaviour

Running the bundled file output

hi from greetings

.

api.greetings.hello(); is removed even if it has a side effect.

It works when src/api/index.js is changed like below

export default {
-  greetings,
+  greetings: {
+    hello: greetings.hello,
+  },
};

Original issue: vitejs/vite#11356

[sapphi-red]

This doesn't happen with 2.79.1 and happens with 3.0.0.

[lukastaegert]

As it turns out, the case where a namespace is itself nested inside an object was not yet handled correctly. Fix for this and similar issues at #4758.

[rollup-bot]

This issue has been resolved via #4758 as part of rollup@3.7.5. You can test it via npm install rollup.

[sapphi-red]

Thanks!