1.5.1 TypeError: WeakMap key null must be an object or an unregistered symbol

[pheidt]

Describe the bug

In version 1.5.1, passing an object with null or undefined properties to toMatchObjectContaining causes a type error. The same code works as expected in version 1.5.0.

Reproduction

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

test('breaks in 1.5.1', () => {
  expect({ a: null, b: 'b' }).toMatchObject({ a: null });
});

test('still works in 1.5.1', () => {
  expect({ a: null, b: 'b' }).toEqual(expect.objectContaining({ a: null }));
});

System Info

System:
    OS: macOS 14.4.1
    CPU: (10) arm64 Apple M1 Pro
    Memory: 311.91 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.12.2 - ~/.nvm/versions/node/v20.12.2/bin/node
    Yarn: 1.22.19 - ~/.nvm/versions/node/v20.12.2/bin/yarn
    npm: 10.5.0 - ~/.nvm/versions/node/v20.12.2/bin/npm
    pnpm: 8.10.0 - ~/.nvm/versions/node/v20.12.2/bin/pnpm
    bun: 1.0.29 - /opt/homebrew/bin/bun
  Browsers:
    Brave Browser: 124.1.65.114
    Chrome: 124.0.6367.80
    Edge: 124.0.2478.51
    Safari: 17.4.1

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.

[hi-ogawa]

Thanks for the report. The fix has been already merged but not released yet #5613