kamranayub/rollup-bug-reexporting-preserveModules

Rollup Bug Reproduction

To build:

yarn
yarn build

View build output: dist/index.js

The Problem

With preserveModules set to true, Rollup does not seem to de-dupe for nested modules when using export *.

Expected Output

import * as index from './module-a/v1/index.js';
export { index as ModuleA_V1 };
import * as index$1 from './module-b/v1/index.js';
export { index$1 as ModuleB_V1 };

Actual Output

import * as index from './module-a/v1/index.js';
export { index as ModuleA_V1 };
import * as index from './module-b/v1/index.js';
export { index as ModuleB_V1 };

Note the invalid duplicate identifier index being imported.