Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/57279

I noticed this PR was tagged pkg: types and there doesn't seem to be any relevant changes?

by mistake :)

The latest Babel version is causing breakage in Athena Crisis, and I believe this PR is related. Specifically it's breaking the common patterns below:

Spread is somehow broken due to the as const

export const MoveAction = (
  from: Vector,
  to: Vector,
  path?: ReadonlyArray<Vector> | null,
  complete?: boolean,
) =>
  ({
    ...(complete ? { complete } : null),
    from,
    ...(path ? { path } : null),
    to,
    type: 'Move',
  }) as const;

Source: https://github.com/nkzw-tech/athena-crisis/blob/main/apollo/action-mutators/ActionMutators.tsx#L5-L17

Type casting a function isn't working

export default (function lazy(factory) {
  return _lazy(() => factory().catch(importErrorHandler));
} as typeof _lazy);

Source: https://github.com/nkzw-tech/athena-crisis/blob/main/ui/lib/lazy.tsx#L13-L15

The latter works with as (typeof _lazy), however prettier will strip the extraneous parenthesis.

To repro you can clone the linked repo, run pnpm up -r --latest and then run pnpm vitest tests/__tests__/CreateBuildingFog.test.tsx which should show you a number of "Pre-transform error" messages. I can't tell if this is because of the pipeline (React → Babel → Vite → esbuild/swc) or if this is also an issue with Babel only but the setup is fairly common.

Thanks for the report — that's an easy fix, I'll try to have it ready today.

Minimal repro: https://babeljs.io/repl#?browsers=defaults%2C%20not%20ie%2011%2C%20not%20ie_mob%2011&build=&builtIns=false&corejs=3.21&spec=false&loose=false&code_lz=FACglABAvAfBIG8C-ECGBnCBGMwg&debug=false&forceAllTransforms=false&modules=false&shippedProposals=false&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=false&presets=&prettier=false&targets=&version=7.24.9&externalPlugins=%40babel%2Fplugin-syntax-typescript%407.24.7&assumptions=%7B%7D