bug: Rollup: Parse Error: Duplicate export

[danyball]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Stencil Version

3.3.0

Current Behavior

Throws error on npm run build:

[ ERROR ]  Rollup: Parse Error: ./src/components/my-component/my-component.tsx:80:9
           Duplicate export 'MyComponent' (Note that you need plugins to import files that are not JavaScript) Error
           parsing: /Users/XXXX/stencilboilerplate/test/src/components/my-component/my-component.tsx,
           line: 80, column: 9

Expected Behavior

No error.

System Info

MacOS, NPM 8.15.0

Steps to Reproduce

1. create project: npm init stencil
2. add private static myVar = "input" to my-component.tsx
3. also change this line: return format(this.first, this.middle, MyComponent.myVar);
4. run npm run build

Code Reproduction URL

notyet

Additional Information

Creating a static variable is common to add a native event to the documentation with @event in JSDoc comment. For example:

  /**
   * Emitted when a user clicks on the button.
   * @event
   */
  private static eventInput = "input"

[rwaskiewicz]

Thanks @danyball! I've confirmed that this is related to the TypeScript 5 upgrade.

[deleonio]

Yes, we have the same issue, since update stencil from 3.2 to 3.3.

https://github.com/public-ui/kolibri/actions/runs/5081216007/jobs/9129248718

[rwaskiewicz]

Hey folks,

I have a dev build that I believe will fix the issue. Can anyone running into this problem please install it and provide the team and I with some feedback?

npm i @stencil/core@3.3.0-dev.1685651872.3091be9

Thanks!

[danyball]

Is working, thanks @rwaskiewicz !

[rwaskiewicz]

Stencil v3.3.1 has just been released with a fix for this issue. If you encountered it on Stencil v3.3.0, please upgrade to 3.3.1. I'm going to close this issue out, but please feel free to open a new one should the issue reoccur. Thanks!