TypeError: Cannot read properties of undefined (reading 'result') when redirecting before fetcher finished loading

[a1r93]

I'm using React Router as a...

framework

Reproduction

• Go to https://stackblitz.com/edit/github-mhvzvdkl
• Click on the first button to load the data
• Before the load ends, click on the second button that will submit a form and redirect the user
• Open the console to see the following error

System Info

System:
    OS: macOS 14.5
    CPU: (10) arm64 Apple M1 Pro
    Memory: 64.88 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
Binaries:
    Node: 22.11.0 - ~/.nvm/versions/node/v22.11.0/bin/node
    Yarn: 1.22.22 - ~/Library/pnpm/yarn
    npm: 10.9.0 - ~/.nvm/versions/node/v22.11.0/bin/npm
    pnpm: 10.7.0 - ~/Library/pnpm/pnpm
    bun: 1.0.29 - ~/.bun/bin/bun
Browsers:
    Brave Browser: 122.1.63.169
    Chrome: 135.0.7049.96
    Edge: 135.0.3179.85
    Safari: 17.5

Used Package Manager

pnpm

Expected Behavior

No error should pop in the console

Actual Behavior

There is a "Cannot read properties of undefined" error

[omarkhatibco]

I'm have the same issue after upgrading to v7.5.2 but it's when the loader has a redirect

[brophdawg11]

This is fixed by #13521 and will be available in the next release