The non-passing test was only added like 17 hours ago: https://github.com/coreutils/coreutils/commit/14d24f7a530f587099057fa5411ebcf3cfc55e7d https://github.com

The non-passing test was only added like 17 hours ago: https://github.com/coreutils/coreutils/commit/14d24f7a530f587099057fa5411ebcf3cfc55e7d https://github.com/coreutils/coreutils/commit/14d24f7a530f58... So this is a good thing even for coreutils itself, they will slowly find all of these untested bits and specify behaviour more clearly and add tests (hopefully).