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Re: bash 5.2 bad substitution for ${x:+${x}[}
From: |
Chet Ramey |
Subject: |
Re: bash 5.2 bad substitution for ${x:+${x}[} |
Date: |
Thu, 20 Oct 2022 09:07:25 -0500 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.3.3 |
On 10/20/22 5:03 AM, Martin von Gagern wrote:
Bash Version: 5.2
Patch Level: !PATCHLEVEL!
Release Status: release
Description:
Some substitutions that used to work pre 5.2 are failing starting in
5.2. I did a git bisect on that, it's the initial 5.2 commit which
broke this,
https://git.savannah.gnu.org/cgit/bash.git/commit/?h=bash-5.2&id=74091dd4e8086db518b30df7f222691524469998.
According to my reproducing example below, this appears to be due to a
combination of conditional substitution, a variable enclosed in curly
braces and an unbalanced opening square bracket that I think should
only be considered as text without any semantic relevance in this
position.
Thanks for the report. This came up a couple weeks ago in
https://lists.gnu.org/archive/html/bug-bash/2022-10/msg00022.html
and is fixed in the devel branch. I've attached the patch that fixes it.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
nested-brace-expansion.patch
Description: Text document