[bug] Undeclared identifier when exporting namespace from a dynamic import.

[manucorporat]

Rollup Version

2.72.0

Operating System (or Browser)

Any

Node Version (if applicable)

No response

Link To Reproduction

https://rollupjs.org/repl/?version=2.72.0&shareable=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

Expected Behaviour

Notice the generated output:

'use strict';

require('./main-720c2d2f.js');

const Thing = component(() => Promise.resolve().then(function () { return require('./thing_hook-4002d912.js'); }));

const setHeadMeta = () => {
	console.log('');
};

const Page = () => {
	console.log('thing');
	setHeadMeta();
	Thing();
};

var page_hook = /*#__PURE__*/Object.freeze({
	__proto__: null,
	Page: Page,
	handleWatch: handleWatch
});

exports.page_hook = page_hook;
exports.setHeadMeta = setHeadMeta;

When generating the page_hook namespace object:

	handleWatch: handleWatch

The identifier handleWatch is not defined!

Actual Behaviour

Rollup should not generated broken code, pointing to undefined identifiers.

[manucorporat]

@lukastaegert is it a confirmed issue? or am i missing something?

[lukastaegert]

Sorry, missed this one. This looks indeed broken, let me see what I can find out.

[lukastaegert]

For symmetry, component is also not defined in all places where it is used no, that was just a missing import. It seems to be an issue that occurs when Rollup puts other things into a dynamic chunk that are not part of the chunk namespace. Will dig further.

Here is a slight simplification of the issue, but at its core, it seems you need a chain of at least two dynamic imports and a file that is shared between the first and second dynamic import target to trigger: https://rollupjs.org/repl/?version=2.72.0&shareable=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

[lukastaegert]

Fix at #4499