handleError in entry.server.ts receives wrong params

[heivo]

I'm using React Router as a...

framework

Reproduction

I am using a fetcher to make a server request to a dynamic route, (e.g. /api/:param1/:param2 -> /api/abc/def).

Within the server action the params have the correct values:

param1=abc
param2=def

When there is an error (e.g. by cancelling the request) and I try to access the params within the handleError(error, {params}) function in entry.server.ts the second param has the wrong value:

param1=abc
param2=def.data

System Info

System:
    OS: Linux 6.5 Ubuntu 24.04.1 LTS 24.04.1 LTS (Noble Numbat)
    CPU: (16) x64 AMD Ryzen 9 PRO 7940HS w/ Radeon 780M Graphics
    Memory: 19.45 GB / 29.99 GB
    Container: Yes
    Shell: 5.9 - /usr/bin/zsh
  Binaries:
    Node: 22.1.0 - /run/user/1000/fnm_multishells/43342_1736258894791/bin/node
    npm: 10.7.0 - /run/user/1000/fnm_multishells/43342_1736258894791/bin/npm
    pnpm: 9.11.0 - ~/.local/share/pnpm/pnpm
  Browsers:
    Chrome: 131.0.6778.204
  npmPackages:
    @react-router/dev: ^7.1.1 => 7.1.1 
    @react-router/express: ^7.1.1 => 7.1.1 
    @react-router/node: ^7.1.1 => 7.1.1 
    react-router: ^7.1.1 => 7.1.1 
    vite: ^5.3.5 => 5.4.9

Used Package Manager

npm

Expected Behavior

Dynamic path params receive the right values in the handleError function of entry.server.ts.

Actual Behavior

When the route ends with a dynamic param the value of this param ends with .data.