From: Daniil Iaitskov <daniil.iaitskov@soostone.com>
To: zsh-workers@zsh.org
Subject: bug: nested for loop body is executed once!
Date: Thu, 12 Aug 2021 23:13:09 -0400 [thread overview]
Message-ID: <CAAyLbqKCubQKvXMa5SRkQYgUYBLThzKujm43PmCAuJg45Psdqg@mail.gmail.com> (raw)
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Hi,
I just spot a following bug on Big Sur zsh 5.8 (x86_64-apple-darwin20.0)
$ K="1 2 3"
> $ for i in $(for j in $K; do echo "ddd/$j" ; done) ; do echo "$i" ; done
> ddd/1
> 2
> 3
>
I would expect following output
> ddd/1
> ddd/2
> ddd/3
>
this breaks referential transparency - sorry for FP buzzwords ;)
because
$ for i in $(for j in $(echo 1 2 3); do echo "ddd/$j" ; done) ; do echo
> "$i" ; done
>
produce expected output:
> ddd/1
> ddd/2
> ddd/3
>
I don't know if this is a feature due to some legacy optimizations.
I mostly use BASH and this behavior differs from BASH.
BASH behaves exactly as I expect.
P.S.
Wow! Are you still using just a mailing list for bug tracking?!
I hope my HTML email will be rendered correctly ;)
--
Best regards,
Daniil Iaitskov
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next reply other threads:[~2021-08-13 3:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-13 3:13 Daniil Iaitskov [this message]
2021-08-13 3:47 ` Matthew Martin
2021-08-13 3:50 ` Lawrence Velázquez
2021-08-14 15:07 ` Daniel Shahaf
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