GNU bug report logs - #57102
29.0.50; Peculiar file-name-split edge case

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Philip Kaludercic <philipk <at> posteo.net>
Cc: 57102 <at> debbugs.gnu.org
Subject: bug#57102: 29.0.50; Peculiar file-name-split edge case
Date: Fri, 12 Aug 2022 17:35:30 +0200

Philip Kaludercic <philipk <at> posteo.net> writes:

> I am not sure if this is intentional, but the new `file-name-split'
> is a bit unintuitive in this edge-case:
>
>    (file-name-split "/")        → ("" "" "")
>
> while
>
>    (file-name-split "/a")       → ("" "a")
>    (file-name-split "a/")       → ("a" "")
>    (file-name-split "a/b")      → ("a" "b")

The logic is that

(equal (string-join (file-name-split foo) "/") foo)

is supposed to be always true.  I see that's not the case in the "/"
case, so that needs fixing.

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