Unable to run vite check when a vite config contains a BigInt

[uncvrd]

Describe the bug

Hi! When running vp check with a BigInt, I receive the following error. This occurs because i would like to lint ignore an eslint "magic number" that is of type: Big Int. Alex Lichter on Discord recommended I post here and in the OXC repo, so I'll circular reference those.

OXC Ticket: oxc-project/oxc#24930

vp check
VITE+ - The Unified Toolchain for the Web

[Vite+] resolve universal vite config error: TypeError: Do not know how to serialize a BigInt
    at JSON.stringify (<anonymous>)
    at resolveUniversalViteConfig (file:///tmp/vite-plus-bigint-repro/node_modules/vite-plus/dist/resolve-vite-config-5SuNAKdv.js:83:15)
error: Failed to resolve vite config: GenericFailure, TypeError: Do not know how to serialize a BigInt

Discussion: https://discord.com/channels/1475973262193459293/1529951025505505350

Reproduction

Repro: https://github.com/uncvrd/vite-plus-big-int

Steps to reproduce

1. npm install
2. vp check

System Info

vp v0.2.4

Local vite-plus:
  vite-plus  v0.2.4

Tools:
  vite             v8.1.3
  rolldown         v1.1.4
  vitest           v4.1.10
  oxfmt            v0.57.0
  oxlint           v1.72.0
  oxlint-tsgolint  v0.24.0
  tsdown           v0.22.3

Environment:
  Package manager  npm latest
  Node.js          v24.18.0

Used Package Manager

pnpm

Logs

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue for the same bug.
• Confirm this is a Vite+ issue and not an upstream issue (Vite, Vitest, tsdown, Rolldown, or Oxc).
• The provided reproduction is a minimal reproducible example.

[jong-kyung]

I think this is an invalid rule configuration. Both Oxc and ESLint require ignored BigInt values to be strings.

ignore: ["0n"] // instead of [0n]

cc. @TheAlexLichter

[leaysgur]

That's correct.

As the configuration values are ultimately converted to JSON, BigInt values cannot be passed through as they are.

As this can be reproduced using oxlint on its own, close this issue on the Vite+ side for now. Let's follow up on Oxc repo.