detached child_process doesn't inherit stdio #3596

The following snippet of code prints the child process' output if detached is true, and doesn't if it's false:

  cmd = '...'
  child_process.spawn(cmd, [], {
    stdio: 'inherit',
    detached: true
  });

This part of the docs seems relevant:

If the parent's stdio is inherited, the child will remain attached to the controlling terminal.

Which seems to imply that inheriting these streams is supported. Not sure if this is just me misreading the docs or...