World splitting is correct; demonstration by the reporter is wrong.
The read command yields the expected array. When the array a is
substituted, the command
printf -- '-%s-\n' ${a[*]}
is interpreted as
printf -- '-%s-\n' a b c d
which produces the reported output indeed. On the other hand, the
following command, with "${a[@]}" instead of ${a[*]} produces the
expected output:
printf 'a b/c\nd\0' | while IFS=/ read -d $'\0' -r -a a; do printf --
'-%s-\n' "${a[@]}"; done
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https://bugs.launchpad.net/bugs/1617572
Title:
Field splitting is not done correctly
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