[Bug]: toMatchObject incorectly handles nulls in lists of sets

[gorbak25]

Version

29.7.0

Steps to reproduce

For this match

expect([null]).toMatchObject([new Set()]);

Expected behavior

It should throw an exception

Actual behavior

But it doesn't throw an exception. What's interesting is that

expect(null).toMatchObject(new Set()); 

behaves as expected.

Additional context

No response

Environment

System:
    OS: Linux 6.1 Debian GNU/Linux 12 (bookworm) 12 (bookworm)
    CPU: (8) x64 Intel(R) Core(TM) i5-8365U CPU @ 1.60GHz
  Binaries:
    Node: 20.6.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 9.8.1 - /usr/local/bin/npm
    pnpm: 8.7.5 - /usr/local/share/npm-global/bin/pnpm
  npmPackages:
    jest: ^29.7.0 => 29.7.0

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[gorbak25]

Is this a bug or expected behaviour?

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[github-actions]

This issue was closed because it has been stalled for 30 days with no activity. Please open a new issue if the issue is still relevant, linking to this one.

[SimenB]

Deffo a bug - PR welcome! 😀

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[ofekm97]

@SimenB
Will appreciate a review on the PR linked above 🙌

[ofekm97]

@SimenB kindly reminder 😄

[ofekm97]

@bensternthal / @cpojer would appreciate a review on the PR 🙌

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[ofekm97]

bump

[SimenB]

https://github.com/jestjs/jest/releases/tag/v30.0.0-alpha.4

[github-actions]

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