Public bug reported:
Binary package hint: dash
This script:
cnt=6
while [ $((cnt = cnt - 1)) -gt 0 ]; do
echo $cnt
done
Is not parsed. Expansion and assignment in shell arithmetic appear to be
mandated by the POSIX standard.
http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_06_04
"All changes to variables in an arithmetic expression shall be in effect
after the arithmetic expansion, as in the parameter expansion
"${x=value}".
If the shell variable x contains a value that forms a valid integer
constant, then the arithmetic expansions "$((x))" and "$(($x))" shall
return the same value."
** Affects: dash (Ubuntu)
Importance: Undecided
Status: Unconfirmed
--
dash does not parse valid POSIX arithmetic
https://launchpad.net/bugs/92189
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