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Re: @Q breaks set -o nounset
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From: |
Chet Ramey |
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Subject: |
Re: @Q breaks set -o nounset |
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Date: |
Mon, 4 Mar 2019 15:15:23 -0500 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 |
On 3/3/19 11:53 AM, Martin Schulte wrote:
> Hello,
>
> with "GNU bash, version 4.4.12(1)-release (x86_64-pc-linux-gnu)" I get
> the following behaviour:
>
> + bash -c 'set -o nounset; echo $x'
> bash: x: unbound variable
> + bash -c 'set -o nounset; echo ${x}'
> bash: x: unbound variable
> + bash -c 'set -o nounset; echo ${x@Q}'
>
> + bash -c 'set -o nounset; echo ${x/a/b}'
> bash: x: unbound variable
>
> "GNU bash, version 5.0.0(1)-release (x86_64-pc-linux-gnu)" behaves
> identically.
>
> So, @Q breaks the 'set -o nounset'.
>
> Is this intended?
It's probably an oversight. I'll look into it. Thanks for the report.
--
``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/