In the given reproducer, I am not sure btrfs is relevant here on my good'ol ext4 I got.
$ mount | grep '/d2 ' | sed 's/(.*//' /dev/sda1 on /d2 type ext4 $ cd /d2 ; mkdir -p a/b/c ; cd a/b/c ; rmdir /d2/a/b/c $ bash -c 'pwd' shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory pwd: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory $ ksh -c 'pwd' ksh: pwd: cannot determine present working directory [No such file or directory] $ zsh -c 'pwd' . That's true that the bash shell-init: could be omitted and defered until one ask for pwd explicitly. I don't see any *ino* jazz here, but the classic, my current dir has been removed under my feet. I may have mis-read the *ino* part though.
