Re: Arithmetic expansion in rediretion word is evaluated twice

From	worley@alum.mit.edu (Dale R. Worley)
Newsgroups	gnu.bash.bug
Subject	Re: Arithmetic expansion in rediretion word is evaluated twice
Date	2020-06-02 21:14 -0400
Message-ID	<mailman.1026.1591146888.2541.bug-bash@gnu.org> (permalink)
References	<e77206bd-282c-1b99-d733-1fdd26289e9c@case.edu> <87sgfdeyrp.fsf@hobgoblin.ariadne.com>

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Chet Ramey <chet.ramey@case.edu> writes:
> On 6/1/20 3:34 PM, Oguz wrote:
>> See:
>> 
>>     $ unset foo
>>     $ : <$((foo+=42))
>>     bash: 84: No such file or directory
>>     $ echo $foo
>>     84
>
> Yes. The redirection is evaluated once for the open and again for the
> error message.

That does seem rather a bug, or at least, a poor error message.  Is it
hard to save the string that was attempted to be opened?

Dale

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Re: Arithmetic expansion in rediretion word is evaluated twice worley@alum.mit.edu (Dale R. Worley) - 2020-06-02 21:14 -0400

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