Bug: Unhandled promise rejection. Deferred response and redirects

[thomaswelton]

Added a failing test for remix-run/remix#10313

Bug Description

Remix server will crash due to an unhandled promise rejection if a loader returns a rejected promise and another part of the application has already issued a redirect response.

Test description

Fictional application that will list users of different organisations. The route /organizations/meta/users defined as

route('organizations/:orgId', 'routes/organizations.tsx', [
  route("users", "routes/organization-users.tsx"),
])

will display the organisation name in the parent routes/organizations.tsx and then show a list of users in an outlet from routes/organization-users.tsx.

If the user promise fails then this error is handled by the Await component and an error message is shown. This can be shown by visiting this organisation /organizations/justpark/users

The error will occur when visiting an organisation where the parent issues a redirect response. Visiting this page /organizations/facebook/users will successfully issue a redirect to the meta organisation, but then the server will crash due to the rejected promise from the users loader.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 4cbe0b4

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[remix-cla-bot]

Hi @thomaswelton,

Welcome, and thank you for contributing to React Router!

Before we consider your pull request, we ask that you sign our Contributor License Agreement (CLA). We require this only once.

You may review the CLA and sign it by adding your name to contributors.yml.

Once the CLA is signed, the CLA Signed label will be added to the pull request.

If you have already signed the CLA and received this response in error, or if you have any questions, please contact us at hello@remix.run.

Thanks!

- The Remix team

[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳