virtualbox 6.0.6 にアップデートしたら vagrant up 時にエラーを吐き出すようになった。
==> default: Checking for guest additions in VM...
The following SSH command responded with a non-zero exit status.
Vagrant assumes that this means the command failed!
setup
Stdout from the command:
Stderr from the command:
bash: line 4: setup: command not found