unexpected breaking changes with `process.exitCode`/`process.exit()`

Version

20.0.0-pre (nightly)

Platform

Darwin dib.lan 22.1.0 Darwin Kernel Version 22.1.0: Sun Oct 9 20:14:30 PDT 2022; root:xnu-8792.41.9~2/RELEASE_ARM64_T8103 arm64

Subsystem

process

What steps will reproduce the bug?

const assert = require('assert')

process.exitCode = 2
delete process.exitCode // REMOVE
assert(process.exitCode === undefined) // REMOVE
process.exit(undefined)

How often does it reproduce? Is there a required condition?

reproduces on all node versions built after landing #44711

What is the expected behavior?

the assertion should pass, and if the two lines marked REMOVE are commented out the process should exit with code 2

What do you see instead?

the assertion throws, and if the two lines marked REMOVE are commented out the process exits with code 0

Additional information

No response

首先，在 #44711 之后的构建上运行复现，并将删除 process.exitCode 与 process.exit(undefined) 进行比较。移除标记的行后，如果断言通过且进程仍以代码 2 退出，则表示完成。