Errors thrown in RSCs cannot be caught

[dylantf]

Reproduction

export function ServerComponent() {
  throw new Error("something");
}

export function ErrorBoundary({ error }) {
  // error is undefined 
}

System Info

react-router 7.9.3 framework mode

Used Package Manager

npm

Expected Behavior

Errors should be populated somewhere so they can be appropriately handled, for example:

• Redirecting the user (e.g. the resource needs authentication to view)
• Displaying an error message at the appropriate error boundary (which is not always immediately where the RSC is rendered, as an RSC may not be at the page level)

Actual Behavior

Errors are undefined at every error boundary