Public bug reported:
lsb_release -rd:
Description: Ubuntu 14.04.1 LTS
Release: 14.04
apt-cache policy dash
dash:
Installed: 0.5.7-4ubuntu1
Candidate: 0.5.7-4ubuntu1
Version table:
*** 0.5.7-4ubuntu1 0
500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
100 /var/lib/dpkg/status
FYI, I reported the bug below on the dash mailing list and got this
response from Herbert Xu:
> This is already fixed in the current git tree, by the commit:
>
> commit a7c21a6f4cb42d967854cae954efd4ee66bdea9c
> Author: Herbert Xu <[email protected]>
> Date: Fri Aug 23 20:04:12 2013 +1000
>
> [EXPAND] Propagate EXP_QPAT in subevalvar
I checked dash_0.5.8-1_amd64.deb from Debian experimental and this bug
seems to be fixed there as well (but still broken in Debian sid, where
the current version is dash_0.5.7-4_amd64.deb).
----------
Hi all. I recently found a bug in dash's handling of substring
processing, when the variable is contained within quotes.
In bash, this works:
bash$ echo $PWD
/home/psmith
bash$ echo ${PWD%${PWD##*/}}.
/home/.
bash$ echo "${PWD%${PWD##*/}}."
/home/.
which is what I expect. However, in dash we get:
dash$ echo $PWD
/home/psmith
dash$ echo ${PWD%${PWD##*/}}.
/home/.
dash$ echo "${PWD%${PWD##*/}}."
.
Whoops! Inside double-quotes dash is mishandling the nested string
substitution. If I break it up into two steps it works OK, regardless
of whether or not it's quoted.
** Affects: dash (Ubuntu)
Importance: Undecided
Status: New
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1378625
Title:
Failure of nested substring processing inside double-quotes
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