Memory leak in wait

[Jean Delvare]

Hi all,

A memory leak has been reported in a bash script I maintain [1]. After
investigation, I was able to shrink the test case down to:

while true
do
        sleep 1 &
        wait $!
done

The above loop has an always-rising memory consumption (RSS value as
reported by ps -o rss.) This one OTOH:

while true
do
        sleep 1 &
        wait
done

shows steady memory consumption, so it would seem that the leak only
occurs when passing a parameter to "wait". I've seen the problem with
bash versions 3.1.14, 4.2.53 and 4.3.30. Version 3.0.16 is not affected.

If this a known problem?

[1] http://lists.lm-sensors.org/pipermail/lm-sensors/2014-November/042913.html

Thanks,
-- 
Jean Delvare
SUSE L3 Support