[BUG] - ?_data= common problem since v1

[miguelvelasquezdev]

Reproduction

Just search https://kentcdodds.com/?_data=

related issues: #5199, #4564

both issues say that you can use handleError, but it just work when the trace comes from an error, but if your loader returns good, then handleError is worthless now.

that's bad because anyone can get sensible data with this trick.

System Info

npm run dev, yarn dev, pnpm dev

Used Package Manager

npm

Expected Behavior

should not expose loader data

Actual Behavior

any remix app with ?_data= in their url is exposing loader data, and if you don't set a loader function it triggers an error that you didn't set up a loader in your route