- The `popd' builtin now treats additional arguments as errors.
popdに余計な引数をつけたらどうなるか、挙動の確認
バージョンごとの確認にはDockerが本当に便利。 https://hub.docker.com/_/bash
bash:4.2
エラーにならない(でもpopd自体は失敗する)
$ docker run -it bash:4.2.53 bash-4.2# pushd /usr/local/ /usr/local / bash-4.2# pwd /usr/local bash-4.2# cd /root/ bash-4.2# pwd /root bash-4.2# popd /usr/local/ ~ bash-4.2# echo $? 0 bash-4.2# pwd /root
bash:4.4
エラーになる
$ docker run -it bash:4.4.23 bash-4.4# pushd /usr/local/ /usr/local / bash-4.4# pwd /usr/local bash-4.4# cd /root/ bash-4.4# pwd /root bash-4.4# popd /usr/local/ bash: popd: /usr/local/: invalid argument popd: usage: popd [-n] [+N | -N] bash-4.4# echo $? 2 bash-4.4# pwd /root
