fs:fs.mkdir() the process does not exit when recursive is set to true in some case

[changk99]

• Version: v10.15.0
• Platform: win10
• Subsystem: x64 win32
  create a new file and set the file name 'test'
  the index.js is same level

// index.js
const fs = require('fs')

fs.mkdir('./test', {
  recursive: true
}, (err) => {
  console.log(err) // [Error: EEXIST: file already exists]
})

this will trigger the error

const fs = require('fs')

fs.mkdir('./test/a', {
  recursive: true
}, (err) => {
  console.log(err) 
})

this will not trigger the error and the process does not exit

if test is a directory is no problem, but if test is a file and recursive is true, the process does not exit and keep waiting and not trigger error

[richardlau]

Duplicate of #27198. This was fixed by #27207 which was included in Node.js 10.16.0.