Double substitution issue

From	William Entriken <fulldecent@gmail.com>
Newsgroups	gnu.bash.bug
Subject	Double substitution issue
Date	2018-02-28 03:25 -0500
Message-ID	<mailman.9859.1519829279.27995.bug-bash@gnu.org> (permalink)

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This behavior is different in zsh and bash, and maybe bash behavior is a
bug.

# Test case

touch 1 2 3
cat > script.sh <<EOL
from=1
to=3
ls {$from..$to}
EOL
chmod a+x script.sh

bash ./script.sh

zsh ./script.sh

# Expected

Both list files 1, 2, 3

# Actual

zsh passes.

Bash fails the chained substitution with:

ls: {1..3}: No such file or directory

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Double substitution issue William Entriken <fulldecent@gmail.com> - 2018-02-28 03:25 -0500
  Re: Double substitution issue fulldecent@gmail.com - 2018-11-20 20:16 -0800
    Re: Double substitution issue Greg Wooledge <wooledg@eeg.ccf.org> - 2018-11-21 08:37 -0500

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