As per Andreas proposal:

> it would be possible to filter out only the Segmentation fault and Bus error messages in the calling shell:

while /bin/true ; do
file=$((RANDOM % MAX))
cp $PROG $DIR/$file > /dev/null 2>&1
$DIR/$file 0.$((RANDOM % 5 + 1)) 2> /dev/null
sleep $((RANDOM % 3))
done 2>&1 | egrep -v "Segmentation fault|Bus error"

> though it may also be necessary to "export LANG=C" so that the messages are in English instead of the local language. Easier to just drop all error messages, like the other scripts do.