Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Extending Array prototype throws an "You stumbled upon a bug" error

See original GitHub issue

I’m trying to extend Array prototype and import ts file somewhere in my project. Doing so, however, throws the following error:

> dev
> npm run server


> server
> ts-node -r tsconfig-paths/register ./server

Server running at http://localhost:3000
Error: [vite-plugin-ssr@0.3.61][Bug] You stumbled upon a bug in vite-plugin-ssr's source code. Reach out at https://github.com/brillout/vite-plugin-ssr/issues/new or https://discord.com/invite/qTq92FQzKb and include this error stack (the error stack is usually enough to fix the problem). A maintainer will fix the bug (usually under 24 hours). Do not hesitate to reach out as it makes vite-plugin-ssr more robust.
    at addString (/Users/alex/Developer/gated-art-web/node_modules/vite-plugin-ssr/dist/cjs/node/html/renderHtml.js:141:28)
    at renderTemplate (/Users/alex/Developer/gated-art-web/node_modules/vite-plugin-ssr/dist/cjs/node/html/renderHtml.js:151:9)
    at renderHtml (/Users/alex/Developer/gated-art-web/node_modules/vite-plugin-ssr/dist/cjs/node/html/renderHtml.js:37:24)
    at executeRenderHook (/Users/alex/Developer/gated-art-web/node_modules/vite-plugin-ssr/dist/cjs/node/renderPage.js:567:58)
    at async renderPage (/Users/alex/Developer/gated-art-web/node_modules/vite-plugin-ssr/dist/cjs/node/renderPage.js:89:30)
    at async renderPageWithoutThrowing (/Users/alex/Developer/gated-art-web/node_modules/vite-plugin-ssr/dist/cjs/node/renderPage.js:131:16)
    at async /Users/alex/Developer/gated-art-web/server/index.ts:42:25

My array extension code is as follows:

export { }

declare global {

  interface Array<T> {
    compactMap<E>(callback: (t: T) => E | null): Array<E>
  }

}

if (!Array.prototype.compactMap) {

  Array.prototype.compactMap = function<T, E>(callback: (t: T) => E | null): Array<E> {
    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    return this.map(callback).filter(x => !!x).map(x => x!)
  }

}

Also made a bare bones project to reproduce the issue: https://github.com/akolov/vite-ssr-array-prototype-bug

Is there anything I’m doing wrong?