Seem like after we are using rollup.js, we didn't output corresponding source map for it. On the other hand, we didn't set the correct outFiles in launch.json:
https://github.com/rust-analyzer/rust-analyzer/blob/a38a3bf2298ceb0bf32cefbc18a427f50caeab84/.vscode/launch.json#L19
Can anyone confirm this bug in other platform (as I'm using Windows) ?