#1197 seems to improperly handle static method in prototype

[calvin-sketchsoft]

Describe the bug

After #1197, Any failed test which contains bson.ObjectId does not display message properly.

 FAIL  test/basic.test.ts [ test/basic.test.ts ]
TypeError: Cannot assign to read only property 'generate' of object '[object Object]'

I tried to attach debugger and found out error obove occurs while creating message to display. clone() tries to copy static method, ObjectId.prototype.generate(), from val and fails to paste it on out.

vitest/packages/vitest/src/utils/base.ts

Line 55 in 5ff4331

out[k] = (tmp = (val as any)[k]) && typeof tmp === 'object' ? clone(tmp) : tmp

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-xnu5kw?file=test%2Fbasic.test.ts,package.json&initialPath=__vitest

System Info

System:
    OS: macOS 12.3.1
    CPU: (10) x64 Apple M1 Pro
    Memory: 25.07 MB / 32.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 14.18.1 - /usr/local/bin/node
    Yarn: 3.1.0 - /usr/local/bin/yarn
    npm: 8.1.1 - /usr/local/bin/npm
  Browsers:
    Chrome: 101.0.4951.54
    Safari: 15.4
  npmPackages:
    vitest: ^0.12.0 => 0.12.0

Used Package Manager

yarn

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