mv: fails if source dir name is subset of target dir name

[cakebaker]

This issue was mentioned by @allaboutevemirolive in #4833 (comment):

$ mkdir test test2
$ cargo run mv test test2
mv: cannot move 'test' to a subdirectory of itself, 'test2/test'

Using different directory names, the same steps work fine:

$ mkdir aa bb
$ cargo run mv aa bb
$ ls bb
aa

[allaboutevemirolive]

Probably related:

Started: Issue #5102

Pull request: Pull request #5104

If the pull request doesn't fix this ticket, then I guess it's a separate problem.

[cakebaker]

No, I don't think it is related to #5102. The issue is caused by https://github.com/uutils/coreutils/blob/main/src/uu/mv/src/mv.rs#L369 and that code is relatively new.