Asynchronous fixtures used concurrently cause Vitest to hang

[dsyddall]

Describe the bug

Given a test with an asynchronously resolved fixture, Vitest hangs when the fixture is used in multiple tests concurrently.

Example test:

import { expect, test } from 'vitest';

const myTest = test.extend<{ a: number }>({
  a: async ({ task }, use) => {
    await new Promise<void>((resolve) => setTimeout(resolve, 200));

    console.log('running test', task.id);
    await use(0);
    console.log('cleaning up test', task.id);
  },
});

myTest.concurrent('fixture - test 1', ({ a }) => {
  expect(a).toBe(0);
});

myTest.concurrent('fixture - test 2', ({ a }) => {
  expect(a).toBe(0);
});

Results of the test:

 DEV  v1.0.0-beta.3 /home/projects/vitest-dev-vitest-9d9pqh
      UI started at http://localhost:51204/__vitest__/

stdout | test/async-fixture.test.ts > fixture - test 2
running test 1084931944_0
running test 1084931944_1
cleaning up test 1084931944_1

 ❯ test/async-fixture.test.ts (2)
   ✓ fixture - test 1
   ✓ fixture - test 2

The first test fixture is never cleaned up, and since the promise returned from the call to use() never resolves, Vitest hangs.

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-9d9pqh?file=test%2Fasync-fixture.test.ts

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.18.0 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 9.4.2 - /usr/local/bin/npm
    pnpm: 8.9.2 - /usr/local/bin/pnpm
  npmPackages:
    @vitest/ui: 1.0.0-beta.3 => 1.0.0-beta.3 
    vite: latest => 4.5.0 
    vitest: 1.0.0-beta.3 => 1.0.0-beta.3

Used Package Manager

pnpm

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• Read the Contributing Guidelines.
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[stackblitz]

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• vitest-dev-vitest-9d9pqh (Open reproduction)