When /bin/kill is given an empty argument, this is converted
to PID 0, with unpleasant effects on kill's process group.
Fix: A simple typo of !*argv where !**argv was clearly meant.
There was another check of the same type, but that one
was clearly unneccessary and I've just removed it.
/bin/kill -CONT ''
Note that you should have got an error.
Fixed in kill.c, rev 1.9, and 22.214.171.124.