DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 57VJ6xdm2509971
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 2688A3858CD1
MIME-Version: 1.0
Date: Sun, 31 Aug 2025 12:06:09 -0700
Message-ID: <CADxVF5dR-0Z-fvjTNkMfC1U=12T7WfuipiODhuZNizQDUPL5AA@mail.gmail.com>
Subject: bash 5.2.21-1: a bug in [0-9] expansion
To: Cygwin List <cygwin AT cygwin DOT com>
From: Mariusz Wodzicki via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Mariusz Wodzicki <dura DOT europos AT berkeley DOT edu>
Content-Type: text/plain; charset="utf-8"
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
Content-Transfer-Encoding: 8bit

Description of the problem.
[0-9]  picks also certain Unicode superscript characters ( namely, ⁰ ⁴ ⁵ ⁶
⁷ ⁸ ⁹ ), and every Unicode subscript character.

Example: the directory has the following files:
$ /bin/ls
₀.txt  ₁.txt  ₂.txt  ₃.txt  ₄.txt  ₅.txt  ₆.txt  ₇.txt  ₈.txt  ₉.txt
⁰.txt  ¹.txt  ².txt  ³.txt  ⁴.txt  ⁵.txt  ⁶.txt  ⁷.txt  ⁸.txt  ⁹.txt

$ /bin/ls [0-9].txt
₀.txt  ₁.txt  ₃.txt  ⁴.txt  ⁵.txt  ⁶.txt  ⁷.txt  ⁸.txt
⁰.txt  ₂.txt  ₄.txt  ₅.txt  ₆.txt  ₇.txt  ₈.txt

$ locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_ALL=

System.
Fully up to date Windows 11
cygwin 3.6.4-1
bash    5.2.21-1

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple