The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received an instance of Object

[dimaMachina]

Describe the bug

I am migrating tests from jest to vitest and ran into an error from this line

vitest/packages/vitest/src/node/pools/forks.ts

Line 33 in 4e60333

deserialize: v => v8.deserialize(Buffer.from(v)),

or this line (these functions are identical, so I am not sure which is right)

vitest/packages/vitest/src/node/pools/vmForks.ts

Line 38 in 4e60333

deserialize: v => v8.deserialize(Buffer.from(v)),

here is the stack trace

TypeError: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received an instance of Object
 ❯ Function.from node:buffer:319:9
 ❯ deserialize ../../node_modules/vitest/dist/chunks/resolveConfig.RxKrDli4.js:6716:67
 ❯ EventEmitter.onMessage ../../node_modules/vitest/dist/chunks/index.68735LiX.js:82:17
 ❯ EventEmitter.emit node:events:519:28
 ❯ Object.postMessage ../../node_modules/vitest/dist/chunks/resolveConfig.RxKrDli4.js:6711:39
 ❯ ChildProcess.<anonymous> ../../node_modules/tinypool/dist/index.js:216:30
 ❯ ChildProcess.emit node:events:519:28
 ❯ emit node:internal/child_process:951:14
 ❯ process.processTicksAndRejections node:internal/process/task_queues:83:21

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-qyahuvyc?file=test%2Fbasic.test.ts

v argument in my case is

{
  v: {
    jsonrpc: '2.0',
    method: 'window/logMessage',
    params: {
      type: 1,
      message: 'Received message which is neither a response nor a notification message:\n' +
        '{\n' +
        '    "type": "Buffer",\n' +
        '    "data": [\n' +
        '        255,\n' +
        '        15,\n' +
        '        111,\n' +
        '        34,\n' +
        '        1,\n' +
        '        116,\n' +
        '        34,\n' +
        '        1,\n' +
        '        115,\n' +
        '        34,\n' +
        '        1,\n' +
        '        105,\n' +
        '        34,\n' +
        '        21,\n' +
        '        71,\n' +
        '        101,\n' +
        '        112,\n' +
        '        110,\n' +
        '        56,\n' +
        '        49,\n' +
        '        99,\n' +
        '        73,\n' +
        '        122,\n' +
        '        98,\n' +
        '        52,\n' +
        '        102,\n' +
        '        55,\n' +
        '        106,\n' +
        '        105,\n' +
        '        77,\n' +
        '        50,\n' +
        '        57,\n' +
        '        48,\n' +
        '        122,\n' +
        '        108,\n' +
        '        34,\n' +
        '        1,\n' +
        '        114,\n' +
        '        95,\n' +
        '        34,\n' +
        '        1,\n' +
        '        101,\n' +
        '        95,\n' +
        '        123,\n' +
        '        4\n' +
        '    ]\n' +
        '}'
    }
  }
}

System Info

System:
    OS: macOS 13.4
    CPU: (12) x64 Apple M2 Max
    Memory: 8.74 GB / 96.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.17.0 - ~/.local/state/fnm_multishells/55235_1734137834788/bin/node
    Yarn: 1.22.22 - ~/.local/state/fnm_multishells/55235_1734137834788/bin/yarn
    npm: 10.8.2 - ~/.local/state/fnm_multishells/55235_1734137834788/bin/npm
    Watchman: 2024.08.05.00 - /usr/local/bin/watchman
  Browsers:
    Chrome: 128.0.6613.114
    Safari: 16.5
  npmPackages:
    vitest: ^2.1.8 => 2.1.8

Used Package Manager

yarn

Validations

• Follow our Code of Conduct
• 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.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[github-actions]

Hello @dimaMachina. Please provide a minimal reproduction using a GitHub repository or StackBlitz (you can also use examples). Issues marked with needs reproduction will be closed if they have no activity within 3 days.

[dimaMachina]

@AriPerkkio repro

[hi-ogawa]

Probably vscode-jsonrpc/node is interfering with IPC channel used by Vitest. This is a minimal repro:

https://stackblitz.com/edit/vitest-dev-vitest-iqv9ueqx?file=test%2Frepro.test.ts

import { test } from 'vitest';

test('repro', async () => {
  process.send!({ repro: 'boom!!' });
});

From your sample code, I'm not sure if actual IPC is necessary since you didn't manage a parent process. Maybe isn't it intended to mock out process here somehow?

      reader = new IPCMessageReader(process);
      writer = new IPCMessageWriter(process);

[dimaMachina]

From your sample code, I'm not sure if actual IPC is necessary since you didn't manage a parent process. Maybe isn't it intended to mock out process here somehow?

idk, current tests worked fine with jest but not with vitest