Vite dev server crashes if error is introduced in `vite.config.js`

[Rich-Harris]

Describe the bug

If you run vite dev then introduce a syntax error in vite.config.js, the dev server tries and fails to restart, and the process crashes.

Ideally the process would stay alive, and gracefully recover once the error is fixed. Even better would be if the server survived, if only to report the error, though that's probably somewhat trickier.

Reproduction

https://github.com/Rich-Harris/vite-dev-server-crashes

Steps to reproduce

Instructions in the repro README

System Info

System:
    OS: macOS 13.2.1
    CPU: (10) arm64 Apple M1 Pro
    Memory: 144.45 MB / 32.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 18.15.0 - ~/Library/pnpm/node
    npm: 9.5.0 - ~/Library/pnpm/npm
  Browsers:
    Chrome: 111.0.5563.64
    Firefox: 110.0.1
    Safari: 16.3
  npmPackages:
    vite: ^4.1.4 => 4.1.4

Used Package Manager

pnpm

Logs

No response

Validations

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• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
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• The provided reproduction is a minimal reproducible example of the bug.